| 单词 | atomic number 79 |
| 释义 | atomic number 79 (once / 11819311 pages) n WORD FAMILY atomic number 79 n a soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia Syn|Hypo|Hyper Au, gold 24-karat gold, pure gold 100 per cent gold gold dustthe particles and flakes (and sometimes small nuggets) of gold obtained in placer mining green golda gold alloy (at least 14 karat gold with silver or silver and cadmium) that has a green appearance guinea gold22-karat gold from which guinea coins were made noble metal any metal that is resistant to corrosion or oxidation |
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