Atomic Number 21 Learn more about the atomic number. Scandium burns easily and reacts with water. 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. Therefore electronic configuration of scandium(Sc) is: 1s2 2s2 2p6 3s2 3p6 3d1 4s2. Scandium (Sc) has an atomic number of twenty-one. Atomic Mass 44,95591 Learn more about the atomic mass. of 21. 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. Scandium is a chemical element with symbol Sc and atomic number 21. 4s 2: Oxidation states: Sc 3+ Physical appearance: Scandium easily reacts with dilute acids. In the periodic table Sc is a member of 3 rd group and 4 th period. Chemical Characteristics. Classified as a transition metal, Scandium is a solid at room temperature. Name Origin The colour it develops when exposed to air is yellowish or pinkish cast. : Sc 3+ is enriched in Ca-Al-rich inclusions in meteorites relative to the composition of the solar system. It reacts with water and form hydrogen gas. : Sc 3+ enters early-forming phases in igneous rocks. Scandium iodide (ScI3) is used in lamps that produce light having a color closely matching natural sunlight. Scandium is mined from one of the rare minerals from Scandinavia. Its atomic number is 21 and indicated by the symbol Sc. Eighth most abundant 'rare earth' found in the earth's crust (5.0 ppm). Interesting Scandium Facts: Scandium was discovered in 1879 by Lars Fredrik Nilson, who named it after Scandinavia. Geochemistry of Scandium; Goldschmidt classification: Lithophile: Sc 3+ was one of the ions least depleted from the mantle in the formation of the crust. Scandium is a chemical element that has the symbol Sc and the atomic number 21. What is Scandium? Description Fairly soft, silvery-white metal. : Sc 3+ is commonly concentrated in residual soils and sediments. 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. Scandium. Its atomic number is 21 and atomic weight is 44.95g/mol. This member of the transition elements group is a silver-white that has been historically categorized as a rare earth element. Scandium has an atomic no. It is easily burnt and get tarnished in the presence of air. One of the characteristics of Scandium is it gets tarnished and burned easily if ignited. Scandium is an element with the atomic number 21 and represented with the symbol ‘Sc‘ in the periodic table. Scandium is a silver-white hard metal which develops a slightly yellowish or pinkish cast upon exposure to air. 3d 1. The atomic weight of Sc is 44.95591 grams per mole. The atomic number of scandium (Sc) is 21. 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