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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク divalent ： ウィキペディア英語版 divalent In chemistry, a divalent (sometimes bivalent〔(Explanation on numerical prefixes )〕) element, ion, functional group or molecule has a valence of two. Valency is the number of chemical bonds formed, which may be covalent, polar covalent or ionic. Examples: * Divalent elements include calcium and sulfur. While the bonds formed by calcium are ionic; sulfur can form covalent bonds as in H2S or ionic bonds as in Na2S. * Divalent anions have a charge of −2, for example S2− and SO42−. * Divalent cations have a charge of +2, for example Fe2+, Ca2+ and Hg22+. * Divalent functional groups include the imino (=NH) and carbonyl (=O). ==Water Hardness== (詳細はlimescale.〔World Health Organization (Hardness in Drinking-Water ), 2003〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「divalent」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.