陽離子
陽離子者，乃帶正電荷之離子也。云原子之失電子，故得正電。世之陽離子，多為金屬之離子，亦有水合氫離子、銨離子等也。其化學之性，合陰離子以成離子化合物也。其中或有色，如銅離子之色藍也，鎳離子之色綠也。
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