题目内容
下列叙述中不正确的是
2021-09-05
A.离子是带电的原子或原子团
B.共价化合物在纯液态时不存在离子
C.离子化合物中阴、阳离子个数不一定相等
D.NaCl是电解质,Cu是非电解质
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