It reacts with water and form hydrogen gas. Chemical Characteristics. Scandium (Sc) has an atomic number of twenty-one. Scandium has an atomic no. Scandium is a silver-white hard metal which develops a slightly yellowish or pinkish cast upon exposure to air. Its atomic number is 21 and indicated by the symbol Sc. 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. 4s 2: Oxidation states: Sc 3+ Physical appearance: Pure form of scandium is produced by heating scandium fluoride with calcium metal. of 21. This member of the transition elements group is a silver-white that has been historically categorized as a rare earth element. Scandium is a chemical element that has the symbol Sc and the atomic number 21. Its atomic number is 21 and atomic weight is 44.95g/mol. The colour it develops when exposed to air is yellowish or pinkish cast. Scandium easily reacts with dilute acids. Description Fairly soft, silvery-white metal. Atomic number: 21: Atomic mass: 44.955910: Common isotopes: 45 Sc – 100% Other isotopes exist, see Isotopes of Scandium: Ground state electronic configuration: [Ar]. Scandium iodide (ScI3) is used in lamps that produce light having a color closely matching natural sunlight. : Sc 3+ is commonly concentrated in residual soils and sediments. : Sc 3+ is enriched in Ca-Al-rich inclusions in meteorites relative to the composition of the solar system. Atomic Mass 44,95591 Learn more about the atomic mass. One of the characteristics of Scandium is it gets tarnished and burned easily if ignited. Interesting Scandium Facts: Scandium was discovered in 1879 by Lars Fredrik Nilson, who named it after Scandinavia. It is easily burnt and get tarnished in the presence of air. Scandium burns easily and reacts with water. Scandium is an element with the atomic number 21 and represented with the symbol ‘Sc‘ in the periodic table. Eighth most abundant 'rare earth' found in the earth's crust (5.0 ppm). You, Sir, could have impregnated google with the question and an answer would have been delivered to you within a second. The atomic number of scandium (Sc) is 21. What is Scandium? Geochemistry of Scandium; Goldschmidt classification: Lithophile: Sc 3+ was one of the ions least depleted from the mantle in the formation of the crust. It is a soft silvery metal that has three times the density of water and can be found in the form of solid at room temperature. : Sc 3+ enters early-forming phases in igneous rocks. Scandium is mined from one of the rare minerals from Scandinavia. 3d 1. The atomic weight of Sc is 44.95591 grams per mole. 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. Atomic Number 21 Learn more about the atomic number. Scandium is a silvery-white metallic d-block element. 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