Metal oxides contain a metal cation and the oxide anion (O2-); they typically react with water to form Bases or with acids to form salts.

• 金属氧化物是含有一个金属阳离子和氧化物阴离子(O2-)的结晶固体。它们典型地与水反应生成碱,或与酸反应生成盐。