挑战习题
1/5单选题
难度:

1.人们对未发现的第114号元素很感兴趣,预测它有良好的力学、光学、电学性质,它被命名为“类铅”.以下对“类铅”的叙述正确的是
A 最外层有6个电子
B 位于元素周期表的第七周期
C 主要化合价为-4价、+4价
D 电解硝酸铜与硝酸“类铅”的混合溶液时首先会析出“类铅”
提示1:
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提示2:
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提示3:
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正确答案:Qg==
Qe+8juWFtuacgOWkluWxgueUteWtkOaVsOS4ujTvvIzmlYVB6ZSZ6K+v77ybPGJyPkLvvI7ljp/lrZDnu5PmnoTkuK3mnIk35Liq55S15a2Q5bGC77yM5L2N5LqO5YWD57Sg5ZGo5pyf6KGo55qE56ys5LiD5ZGo5pyf77yM5pWFQuato+ehru+8mzxicj5D77yO6K+l5YWD57Sg5Li66YeR5bGe5YWD57Sg77yM5rKh5pyJLTTku7fvvIzmlYVD6ZSZ6K+v77ybPGJyPkTvvI7lm6DmsKfljJbmgKdDdTxzdXA+Mis8L3N1cD7nmoTlpKfkuo7igJznsbvpk4XigJ3nprvlrZDvvIzliJnnlLXop6PnoZ3phbjpk5zkuI7noZ3phbjigJznsbvpk4XigJ3nmoTmt7flkIjmurbmtrLml7bpppblhYjkvJrmnpDlh7pDde+8jOaVhUTplJnor6/vvJs8YnI+5pWF6YCJQu+8jg==