| 单词 | krypton |
| 释义 | Word Frequency krypton(ˈkrɪptɒn) noun an inert gaseous element occurring in trace amounts in air and used in fluorescent lights and lasers. Symbol: Kr; atomic no: 36; atomic wt: 83.80; valency: 0; density: 3.733 kg/m3; melting pt: –157.37°C; boiling pt: –153.23±0.10°C Word origin C19: from Greek, from kruptos hidden; see crypt |
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