| 单词 | atomic number 19 |
| 释义 | atomic number 19 (once / 11819311 pages) n WORD FAMILY atomic number 19 n a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite Syn|Hyper K, potassium metal, metallic element any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
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