Silicon (silicone) - keisou (English spelling) silicon

Japanese: ケイ素(珪素) - けいそ（英語表記）silicon

Periodic table Element symbol = Si Atomic number = 14 Atomic weight = 28.0855 ± 3 Abundance in the earth's crust = 28.15% (2nd place) Abundance ratio of stable nuclides ^28Si = 92.18%, ^29Si = 4.71%, ^30Si = 3.12% Melting point = 1414°C Boiling point = 2335°C Specific gravity = 2.33 (18°C) Electron configuration = [Ne] ^3s2 ^3p2 Main oxidation number = II, IV One of the carbon group elements belonging to group IVB of the periodic table. Also called silicon. It does not exist in a free state in nature, but exists in large amounts in rocks as oxides and silicates, and is the main component of the earth's crust.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

周期表元素記号＝Si　原子番号＝14原子量＝28.0855±3地殻中の存在度＝28.15％(2位)安定核種存在比　²⁸Si＝92.18％，²⁹Si＝4.71％，³⁰Si＝3.12％融点＝1414℃　沸点＝2335℃比重＝2.33(18℃)電子配置＝［Ne］3s²3p²　おもな酸化数＝II,IV周期表第IVB族に属する炭素族元素の一つ。シリコンともいう。天然には遊離の状態では存在しないが，酸化物やケイ酸塩として岩石中に多く存在し，地殻形成の主成分となっている。

出典　株式会社平凡社世界大百科事典第２版について　情報

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