C. 1s22s1. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. In the case of Lithium the abbreviated electron configuration is [He] 2s1. Holmium is a relatively soft and malleable silvery-white metal. The chemical symbol for Einsteinium is Es. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. Lithium reacts with water easily, but with noticeably less vigor than other alkali metals. The electronic ground state for lithium is 1s22s, and not 1s22p. The chemical symbol for Dysprosium is Dy. 1s2 B. Which is the electron configuration for lithium? Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Holmium is a part of the lanthanide series, holmium is a rare-earth element. Europium is one of the least abundant elements in the universe. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. The chemical symbol for Indium is In. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. Lithium has an atomic number of 3. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. The chemical symbol for Mendelevium is Md. Tin is a post-transition metal in group 14 of the periodic table. The chemical symbol for Holmium is Ho. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Therefore the Li electron configuration will be 1s 2 2s 1. [Xe] 6s2 for barium). In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. If you continue to use this site we will assume that you are happy with it. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. eval(ez_write_tag([[300,250],'material_properties_org-banner-2','ezslot_10',111,'0','0']));report this adSince the number of electrons and their arrangement are responsible for the chemical behavior of atoms, the atomic number identifies the various chemical elements. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. A neutron is one of the subatomic particles that make up matter. The first 2 are located in the first electron shell. It is the Pauli exclusion principle that requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. By mass, aluminium makes up about 8% of the Earth’s crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. The chemical symbol for Lead is Pb. The chemical symbol for Hafnium is Hf. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1839 times greater than that of the electron. In the universe, neutrons are abundant, making up more than half of all visible matter. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. is a rare earth element with a metallic silver luster. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. The chemical symbol for Neon is Ne. Electron configuration of Lithium is [He] 2s1. Electronic configuration: 1s 2 2s 1 >> Back to key information about the elementBack to key information about the element For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. Pure radium is silvery-white alkaline earth metal. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). The chemical symbol for Aluminum is Al. Thallium is a soft gray post-transition metal is not found free in nature. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. A freshly exposed surface of pure copper has a reddish-orange color. Although neodymium is classed as a rare earth, it is a fairly common element. Lithium has an atomic number of 3. The chemical symbol for Germanium is Ge. and Gay-Lussac, L.-J. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. Neodymium is a soft silvery metal that tarnishes in air. Nevertheless, check the complete configuration and other interesting facts about Lithium that most people don't know. Beside that lithium has electron configuration of: Li = 1s2 2s1 . Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Most elements have more than one possible oxidation state. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. The chemical symbol for Lutetium is Lu. In the periodic table, the elements are listed in order of increasing atomic number Z. Electron configuration of Lithium is … The chemical symbol for Rhodium is Rh. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Lithium Fluoride One lithium atom can combine with one fluorine (F) atom. The chemical symbol for Promethium is Pm. Period 2 elements obey the octet rule in that they need eight electrons to complete their valence shell, where at most eight electrons can be accommodated: two in the 2s orbital and six in the 2p subshell. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. In the universe, protons are abundant, making up about half of all visible matter. Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. Hence today it is well known that the correct electron configuration of Lithium should be given by this correct image including the following electron configuration: 1s 2 2s 1. Which element has the following electron configuration: [Xe] 6s^(2) 5d^(1) 4f^(1) Science. The chemical symbol for Uranium is U. In the periodic table, the elements are listed in order of increasing atomic number Z.eval(ez_write_tag([[580,400],'material_properties_org-medrectangle-4','ezslot_9',114,'0','0'])); Electron configuration of Lithium is [He] 2s1. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. Fluorine has seven electrons of it's own. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. Click Check to check your work, and then list each configuration below: 5. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. The chemical symbol for Selenium is Se. The chemical symbol for Nickel is Ni. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Under standard conditions, it is the lightest metal and the lightest solid element. Many other rare types of decay, such as spontaneous fission or neutron emission are known. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Berkelium is a member of the actinide and transuranium element series. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. The chemical symbol for Mercury is Hg. Cerium is the second element in the lanthanide series. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. The chemical symbol for Tellurium is Te. The chemical symbol for Chromium is Cr. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. The chemical symbol for Sodium is Na. In the periodic table, the elements are listed in order of increasing atomic number Z. A step-by-step description of how to write the electron configuration for Lithium (Li). Similarly, adding electrons results in a negative oxidation state. The electronic configuration of an atom is a description of how the electrons are arranged. The periodic table is a tabular display of the chemical elements organized on the basis of their atomic numbers, electron configurations, and chemical properties. The current IUPAC Gold Book definition of oxidation state is: “Oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds…”. Neptunium metal is silvery and tarnishes when exposed to air. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Lawrencium is the final member of the actinide series. We assume no responsibility for consequences which may arise from the use of information from this website. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. The chemical symbol for Gold is Au. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. The chemical symbol for Palladium is Pd. There are 118 elements in the periodic table. Such an arrangement helps explain the periodicity and periodic trends observed across the elements of the … Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. The chemical symbol for Iron is Fe. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. The traditional argument for why this is so is based on a screening argument that claims that the 2p electron is better shielded by the 1s electrons, and therefore higher in energy than the configuration that includes the 2s electron. Major advantage of lead shield is in its compactness due to its higher density. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. The chemical symbol for Neodymium is Nd. Sub-levels also are made up of orbitals. The current IUPAC Gold Book definition of oxidation state is: “Oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds…”. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. Lithium-6 is valuable as the source material for the production of tritium (hydrogen-3) and as an absorber of neutrons in nuclear fusion reactions. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Potassium: From its position in the periodic table, we know that it has 1 valence electron in the 4s orbital series (because it's in the s block of the fourth period): 4s^1. The chemical symbol for Nobelium is No. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. Lithium (Li). Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. and the term oxidation number is nearly synonymous. The chemical symbol for Radium is Ra. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. The isotope shown here is lithium-7, with a nucleus of 3 protons (red) and 4 neutrons (blue). It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. Naturally occurring lithium is composed of two stable isotopes, 6Li and 7Li, the latter being the more abundant (92.5% natural abundance). and the term oxidation number is nearly synonymous. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. The chemical symbol for Gadolinium is Gd. An element that is not combined with any other different elements has an oxidation state of 0. Gold is a transition metal and a group 11 element. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Thulium is an easily workable metal with a bright silvery-gray luster. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. Electronic configuration, also called electronic structure, the arrangement of electrons in energy levels around an atomic nucleus. what is the electron configuration of lithium after making an octet . The chemical symbol for Copper is Cu. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. The electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. The chemical symbol for Lawrencium is Lr. Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. Since 1s can only hold two electrons the remaining electron for Li goes in the 2s orbital. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. The chemical symbol for Actinium is Ac. The name xenon for this gas comes from the Greek word ξένον [xenon], neuter singular form of ξένος [xenos], meaning ‘foreign(er)’, ‘strange(r)’, or ‘guest’. We realize that the basics in the materials science can help people to understand many common problems. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. The more electrons we have in the atom, the longer the electron configuration. Tungsten is an intrinsically brittle and hard material, making it difficult to work. The chemical symbol for Cobalt is Co. Cobalt is found in the Earth’s crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Our Website follows all legal requirements to protect your privacy. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. 7Li is one of the primordial elements (or, more properly, primordial nuclides) produced in Big Bang nucleosynthesis. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. It is even less abundant than the so-called rare earths. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. This is because of the increase in nuclear charge from +3 to +4. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Similarly, the p block are the right-most six columns of the periodic table, the d block is the middle 10 columns of the periodic table, while the f block is the 14-column section that is normally depicted as detached from the main body of the periodic table. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Lithium is a chemical element with atomic number 3 which means there are 3 protons in its nucleus. The chemical symbol for Berkelium is Bk. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. The traditional argument for why this is so is based on a screening argument that claims that the 2p electron is better shielded by the 1s electrons, and therefore higher in energy than the configuration that includes the 2s electron. The electronic ground state for lithium is 1s 2 2s, and not 1s 2 2p. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. Its boiling point is the lowest among all the elements. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Zirconium is widely used as a cladding for nuclear reactor fuels. The lithium-water reaction at normal temperatures is brisk but nonviolent because the hydrogen produced does not ignite on its own. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. Packing these electrons hierarchically in the orbitals, the electron configuration is 1s22s1 1 s 2 2 s 1 . Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Technetium is the lightest element whose isotopes are all radioactive; none are stable. Atomic Number 37 It could be part of the main body, but then the periodic table would be rather long and cumbersome. Like most other barium salts, it is white, toxic, and imparts a yellow-green coloration to a flame. Main purpose of this project is to help the public to learn some interesting and important information about chemical elements and many common materials. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Both natural isotopes have anomalously low nuclear binding energy per nucleon (compared to the neighboring elements on the periodic table, helium and beryllium); lithium is the only low numbered element that can produce net energy through nuclear fission. The chemical symbol for Fermium is Fm. Lithium atoms have tendencies to form positive atoms because these lithium is a metal. Therefore, the number of electrons in neutral atom of Lithium is 3. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. We have also distinguish between the possible and common oxidation states of every element. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. Electron configuration of Lithium is [He] 2s1. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. The commercial use of beryllium requires the use of appropriate dust control equipment and industrial controls at all times because of the toxicity of inhaled beryllium-containing dusts that can cause a chronic life-threatening allergic disease in some people called berylliosis. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Usually obtained from lithium production. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Possible oxidation states are +1. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. It is the heaviest essential mineral nutrient. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). The metal is separated from other elements in igneous minerals. Use the element blocks of the periodic table to find the highest electron orbital. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. The N shell containing 4s, 4d, 4p and 4f, can carry 32 electrons. The chemical symbol for Samarium is Sm. The beryllium atom is noticeably smaller than the lithium atom. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. The 3rd and 4th electrons must go in the next available sublevel, 2s. Using this notation to compare the electron configurations of sodium and lithium, we have: Sodium: 1s 2 2s 2 2p 6 3s 1 = [Ne]3s 1: Lithium: 1s 2 2s 1 = [He]2s 1: It is readily apparent that both sodium and lithium have one s electron in their valence shell. al. We have a method we can use to simplify writing these configuration as we become more familiar with them. An element that is not combined with any other different elements has an oxidation state of 0. The chemical symbol for Scandium is Sc. The chemical symbol for Europium is Eu. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). Lithium Electronic configuration. Lithium (Li) is an alkali metal with atomic number 3, occurring naturally in two isotopes: 6 Li and 7 Li. 1 Periodic trends 1.1 Lithium 1.2 Beryllium It is the Pauli exclusion principle that requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. What is Conservation of Energy in Thermodynamics – The First Law of Thermodynamics - Definition, What is Uranium in the Environment - Definition, What is Proton and Neutron in Nucleus - Definition, Helium - Electron Configuration and Oxidation States - He, Hydrogen - Electron Configuration and Oxidation States - H, Oganesson - Electron Configuration and Oxidation States - Og, Helium – Electron Configuration and Oxidation States – He, Beryllium – Electron Configuration and Oxidation States – Be. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. The chemical symbol for Praseodymium is Pr. It should be noted that all of these decay pathways may be accompanied by the subsequent emission of gamma radiation. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. The chemical symbol for Beryllium is Be. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. The chemical symbol for Krypton is Kr. Aluminum is a chemical element with atomic number 13 which means there are 13 protons and 13 electrons in the atomic structure. Lithium has many applications, from lubricating grease, alloying additions in particular for aluminium and magnesium alloys, to glazes for ceramics, and finally, lithium batteries. 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