Description Fairly soft, silvery-white metal. Chemical Characteristics. of 21. Atomic number: 21: Atomic mass: 44.955910: Common isotopes: 45 Sc – 100% Other isotopes exist, see Isotopes of Scandium: Ground state electronic configuration: [Ar]. The atomic number of scandium (Sc) is 21. Scandium is mined from one of the rare minerals from Scandinavia. Name Origin Interesting Scandium Facts: Scandium was discovered in 1879 by Lars Fredrik Nilson, who named it after Scandinavia. Scandium (Sc) has an atomic number of twenty-one. One of the characteristics of Scandium is it gets tarnished and burned easily if ignited. Scandium easily reacts with dilute acids. What is Scandium? Scandium iodide (ScI3) is used in lamps that produce light having a color closely matching natural sunlight. Scandium. Classified as a transition metal, Scandium is a solid at room temperature. Scandium burns easily and reacts with water. 3d 1. Scandium is a silver-white hard metal which develops a slightly yellowish or pinkish cast upon exposure to air. The atomic weight of Sc is 44.95591 grams per mole. Atomic Number 21 Learn more about the atomic number. Scandium is a chemical element with symbol Sc and atomic number 21. 4s 2: Oxidation states: Sc 3+ Physical appearance: Atomic Mass 44,95591 Learn more about the atomic mass. : Sc 3+ is enriched in Ca-Al-rich inclusions in meteorites relative to the composition of the solar system. In the periodic table Sc is a member of 3 rd group and 4 th period. Sc is not found free in nature but Scandium is usually found in rare minerals from Scandinavia and Madagascar such as thortveitite, euxenite and gadolinite. Eighth most abundant 'rare earth' found in the earth's crust (5.0 ppm). Scandium is an element with the atomic number 21 and represented with the symbol ‘Sc‘ in the periodic table. It is easily burnt and get tarnished in the presence of air. Scandium is a silvery-white metallic d-block element. Scandium has an atomic no. It reacts with water and form hydrogen gas. Geochemistry of Scandium; Goldschmidt classification: Lithophile: Sc 3+ was one of the ions least depleted from the mantle in the formation of the crust. Its atomic number is 21 and atomic weight is 44.95g/mol. Scandium is a chemical element that has the symbol Sc and the atomic number 21. The colour it develops when exposed to air is yellowish or pinkish cast. You, Sir, could have impregnated google with the question and an answer would have been delivered to you within a second. This member of the transition elements group is a silver-white that has been historically categorized as a rare earth element. Its atomic number is 21 and indicated by the symbol Sc. Scandium-45 atom is the stable isotope of scandium with relative atomic mass 44.955910, 100 atom percent natural abundance and nuclear spin 7/2. 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