这句话的意思是：水分子中的氧原子的化合价是 -2 状态.
这是对的,因为：两个氢原子和一个氧原子形成共价化合物水,一个氧原子通过和两个氢原子共用两个电子对形成共价键,而共用电子对偏向于较大的氧原子,所以氧原子的电荷就会显出“负电荷”的电性,且氢原子锁提供的“两个”电子偏向了氧原子,所以氧原子的化合价是 -2 .
SAT化学问题 20分 急!The oxygen atom in a water molecule has a -2 o
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