… Periodic table Element symbol = Sr Atomic number = 38 Atomic weight = 87.62 Abundance in the earth's crust = 375 ppm (14th place) Abundance ratio of stable nuclides 84 Sr = 0.56%, 86 Sr = 9.86%, 87 Sr = 7.02%, 88 Sr = 82.56% Melting point = 769°C Boiling point = 1384°C Specific gravity = 2.6 (20°C) Electron configuration = [Kr]5s 2 Main oxidation number = II One of the alkaline earth metal elements belonging to the IIA group of the periodic table. It was discovered in 1790 by Adair Crawford (1748-95) of England from the mineral strontianite (mainly composed of strontium carbonate SrCO 3 ) found in the Strontian of Scotland, hence the name. H. Davy (1808) was the first to extract the metal as a single element by electrolysis of molten salt. … *Some of the terminology that mentions "Crawford, A." is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…周期表元素記号=Sr 原子番号=38原子量=87.62地殻中の存在度=375ppm(14位)安定核種存在比 84Sr=0.56%,86Sr=9.86%,87Sr=7.02%,88Sr=82.56%融点=769℃ 沸点=1384℃比重=2.6(20℃)電子配置=[Kr]5s2 おもな酸化数=II周期表第IIA族に属するアルカリ土類金属元素の一つ。スコットランドのストロンチアンに産する鉱物ストロンチアン石(炭酸ストロンチウムSrCO3を主成分とする)から,1790年にイギリスのクローフォードAdair Crawford(1748‐95)によって発見されたのでこの名がある。融触塩の電気分解によって,金属単体としてはじめて取り出したのはH.デービー(1808)である。… ※「Crawford,A.」について言及している用語解説の一部を掲載しています。 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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