Fluorine - Fluorine

Japanese: 弗素(フッ素) - ふっそ（英語表記）fluorine

Periodic table element symbol = F Atomic number = 9 Atomic weight = 18.998403 Abundance in the earth's crust = 625 ppm (12th place) Stable nuclide abundance ratio ¹⁹ F = 100% Melting point = -219.62°C Boiling point = -188°C Gas density = 1.696 g/ l (0°C, 1 atm) Liquid specific gravity = 1.54 (-196°C) Critical temperature = -128.85°C Critical pressure = 51.47 atm Electron configuration = [He]2s ² 2p ⁵ Main oxidation number = -I One of the halogen elements in group VIIB of the periodic table. It is not found in nature as an element due to its strong reactivity, but occurs as minerals such as fluorite (CaF _{2 )} and cryolite (Na ₃ AlF _{6 )} .

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

周期表元素記号＝F　原子番号＝9原子量＝18.998403地殻中の存在度＝625ppm(12位)安定核種存在比　¹⁹F＝100％融点＝－219.62℃　沸点＝－188℃気体の密度＝1.696g/l(0℃，1気圧)　液体の比重＝1.54(－196℃)臨界温度＝－128.85℃　臨界圧＝51.47気圧電子配置＝［He］2s²2p⁵　おもな酸化数＝－I周期表第VIIB族に属するハロゲン元素の一つ。強い反応性のため単体としては天然に産出せず，蛍石CaF₂，氷晶石Na₃AlF₆などの鉱物として産する。

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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