| 单词 | rhodium |
| 释义 | Word Frequency rhodium(ˈrəʊdɪəm) noun a hard corrosion-resistant silvery-white element of the platinum metal group, occurring free with other platinum metals in alluvial deposits and in nickel ores. It is used as an alloying agent to harden platinum and palladium. Symbol: Rh; atomic no: 45; atomic wt: 102.90550; valency: 2–6; relative density: 12.41; melting pt: 1963±3°C; boiling pt: 3697±100°C Word origin C19: New Latin, from Greek rhodon rose, from the pink colour of its compounds |
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