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单词
radon-222
释义
radon-222
radon-222
[
′rā‚dän ‚tü′twen·tē‚tü
]
(nuclear physics)
The isotope of radon having mass number 222, symbol
222
Rn, which is a radioactive member of the uranium series with a half-life of 3.82 days.
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更新时间:2026/10/6 7:28:58