下列关于铷的叙述中不正确的是( )。A.原子半径和离子半径都比钾

下列关于铷的叙述中不正确的是( )。
A.原子半径和离子半径都比钾的大
B.与水反应能放出氢气
C.铷不存在过氧化物
D.碳酸铷在加热时能迅速分解

答案


CD
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