鹼金屬
鹼金屬曰六同族金屬於表內，鋰、鈉、鉀、銣、銫、鈁。色皆銀白，熔點、硬度皆低，鋰鈉鉀遇氧則啞，銣銫遇氧則燃。與水之反應甚烈，釋氫，生氫氧化物，即鹽基，因其氫氧化物皆溶於水，皆可生鹼，故名之。
| 3 Li 鋰 |  |
| 11 Na 鈉 |  |
| 19 K 鉀 |  |
| 37 Rb 銣 |  |
| 55 Cs 銫 |  |
| 87 Fr 鈁 |
易并鹵族、氧族元素而生化合物。熔融態下，可還原鹽以得金屬。須以汽油、煤油存之。惟鋰密度甚小，不以煤油存之，封於石蠟。
鹼金屬一文似未成。宜善之。譯名見異，臺譯在先，陸譯在後，香港兼從
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