NH3 呢個 covalent compound,已經 fully filled outermost electron shell,
點解又可以塞多個 H+ 落去成為 NH4+?
同樣,H2O 又點解會變到做 H3O+?
在教科書中,H2 溶在水中變成 H+ form an acid
但係好多 marking scheme 寫 acid-base reaction D equation
全部係寫 H3O+ 而唔係 H+
點解唔可以就咁寫 H+ 呢?
H3O+ 究竟 cert-level 係唔係 Out C 呢?