鹼土金屬
鹼土金屬者，第二族元素也，乃鈹、鎂、鈣、鍶、鋇、鐳。色皆銀白，熔點、硬度皆低，稍高於鹼金屬者也。性稍躍，遇氧則啞，遇水釋氫，生氫氧化物。此等氫氧化物不溶水，只可以鹽基名之。
| 4 Be 鈹 |  |
| 12 Mg 鎂 |  |
| 20 Ca 鈣 |  |
| 38 Sr 鍶 |  |
| 56 Ba 鋇 |  |
| 88 Ra 鐳 |  |
譯名見異，臺譯在先，陸譯在後，香港兼從
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