Neodymium is a soft silvery metal that tarnishes in air. The chemical symbol for Antimony is Sb. Cl is used as a necessary ingredient in manufacture of medicinal drugs by about 85% of pharmaceuticals. The chemical symbol for Nickel is Ni. Elemental sulfur is a bright yellow crystalline solid at room temperature. These electrons together weigh only a fraction (let say 0.05%) of entire atom. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. The chemical symbol for Gold is Au. The chemical symbol for Beryllium is Be. Element Chlorine - Cl. In the periodic table, potassium is one of the alkali metals. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. In these and similar cases, the atomic radius is designated as a covalent radius. The covalent radius of Cl 2 is the distance between the two chlorine atoms in a single molecule of Cl 2. Relative atomic … Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Titanium can be used in surface condensers. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. The atomic mass is carried by the atomic nucleus, which occupies only about 10-12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. The chemical symbol for Polonium is Po. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. 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 Platinum is Pt. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Anyone can be able to come here, learn the basics of materials science, material properties and to compare these properties. Van der Waals radius is the (imaginary) hard spherical shell around an atom that represents the closest approach of another atom. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. Thulium is the thirteenth and third-last element in the lanthanide series. Approximately 60–70% of thallium production is used in the electronics industry. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. 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