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单词
ionium
释义
ionium
/uy oh"nee euhm/
,
n. Chem.
a naturally occurring radioactive isotope of thorium.
Symbol:
Io;
at. no.:
90;
at. wt.:
230.
[
1905-10; ION + -IUM
]
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更新时间:2025/11/21 20:23:23