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Element Silicon (Si), Group 14, Atomic Number 14, p-block, Mass 28.085. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
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Formula: Si. Molecular weight: 28.0855. IUPAC Standard InChI: InChI=1S/Si. Copy Sheet of paper on top of another sheet. IUPAC Standard InChIKey: XUIMIQQOPSSXEZ-UHFFFAOYSA-N. Copy Sheet of paper on top of another sheet. CAS Registry Number: 7440-21-3. Chemical structure: This structure is also available as a 2d Mol file.
Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive.
Silicon is the 14th element in the periodic table and has a symbol of Si and atomic number of 14. It has an atomic weight of 28.085 and a mass number of 28. Silicon has fourteen protons and fourteen neutrons in its nucleus, and fourteen electrons in three shells.
Silicon dioxide (SiO 2), silicon's most common compound, is the most abundant compound in the earth's crust. It commonly takes the form of ordinary sand, but also exists as quartz, rock crystal, amethyst, agate, flint, jasper and opal.
Get the facts about element Silicon (Si) [14] from the periodic table. Find physical data, electron configuration, chemical properties, aggregation states, isotope data (including decay trees) as well as some historic information.
Isotopes: Silicon has 14 isotopes whose half-lives are known, with mass numbers 22 to 36. Naturally occurring silicon is a mixture of its three stable isotopes and they are found in the percentages shown: 28 Si (92.2%), 29 Si (4.7%) and 30 Si (3.1%).
