单词 | actinon |
释义 | Word Frequency actinon(ˈæktɪˌnɒn) noun 1. a radioisotope of radon that is a decay product of radium. Symbol: An or219Rn; atomic no: 86; half-life: 3.92s 2. another name for actinide Word origin C20: New Latin, from actinium + -on |
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