A.B2A3 | B.B2A | C.BA2 | D.BA |
A.3种 | B.4种 | C.5种 | D.6种 |
A.1s22s22p5 | B.1s22s22p43s2 |
C.1s22s22p63s23p63d54s1 | D.1s22s22p63s23p63d34s2 |
A.其单质常温下跟水反应不如钠剧烈 | B.其原子半径比钾原子半径小 |
C.其碳酸盐易溶于水 | D.其氢氧化物不能使氢氧化铝溶解 |
A.1s22s22p6 | B.1s2 | C.1s22s22p5 | D.1s22s22p63s2 |
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