Arsenic (arsenic)

Japanese: ヒ素(砒素) - ひそ（英語表記）arsenic

Periodic table element symbol = As Atomic number = 33 Atomic weight = 74.9216 Abundance in the earth's crust = 1.8 ppm (51st place) Stable nuclide abundance ratio ⁷⁵ As = 100% Melting point = 817°C (28 atm) Sublimation point = 613°C Specific gravity = 5.73 (gray tin), 2.0 (yellow tin), 4.73 (black tin) Electron configuration = [Ar]3d ¹⁰ 4s ² 4p ³ Main oxidation states = -III, III, V Element in group VB of the periodic table, nitrogen group. It has been known for a long time, and Aristotle described the use of As ₂ S ₃ as a pigment in the 4th century BC.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

周期表元素記号＝As　原子番号＝33原子量＝74.9216地殻中の存在度＝1.8ppm(51位)安定核種存在比　⁷⁵As＝100％融点＝817℃(28気圧)　昇華点＝613℃比重＝5.73(灰色スズ)，2.0(黄色スズ)，4.73(黒色スズ)電子配置＝［Ar］3d¹⁰4s²4p³おもな酸化数＝－III，III，V周期表第VB族，窒素族に属する元素。かなり古くから知られていた元素で，前4世紀ころすでにアリストテレスが顔料に用いられた雄黄As₂S₃について記載している。

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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