楼主打出的题目有误打,下面提供化合价的英文译法,供楼主组合: Fe+ (正二价,国际惯例是2+,不是+2.其余类推) Iron ion two plus; or Iron ion with valence 2. Fe³+ Iron ion three plus; or Iron ion with valence 3. OH- Hydroxide ion O²- Oxygen ion two minus; or Oxygen ion with valence 2-; or Oxygen ion with valence two minus. 铜 = Cu,copper 汞 = Hg,mercury 碳 = C,carbon 锡 = Sn,tin 硫 = S,sulphur,sulfur 氮 = N,nitrogen 磷 = P,phosphorus