单词 | roentgenium |
释义 | roentgenium/rəːntˈɡɛnɪəm / /rʌntˈdʒɛnɪəm / /rɒntˈɡɛnɪəm /noun The chemical element of atomic number 111, a radioactive element produced artificially. (Symbol: Rg) OriginEarly 21st century: named after Wilhelm Conrad Röntgen (see roentgen). |
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