點解Fe metal 會有分Fe2+ 同Fe 3+ ?
仲有ammonia 同ammonium 兩個都係叫氨 離子...咁又有d 咩分別...特性係咪一樣?
thx a lot
收錄日期: 2021-05-03 15:08:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070110000051KK01566