In the compound H2S,hydrogen has an oxidation number of 1+ and sulfur has an oxidation number of ______________.
问题描述：
In the compound H2S,hydrogen has an oxidation number of 1+ and sulfur has an oxidation number of ______________.
答
2-;
意思是：在化合物硫化氢中,氢的价态为+1,硫的价态为-2.