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> 根据如表提供的信息，下列判断不正确的是 A.元素所在的周期数等于其原子的电子层数 B.第二、三周期元素的原子从左至右最外层电子数逐渐增多 C.钠离子核外有三个电子层 D.在化学变化中镁元素容易得到2个电子形成镁离子

问题：

发布时间：2024-09-12

根据如表提供的信息，下列判断不正确的是

A.元素所在的周期数等于其原子的电子层数
B.第二、三周期元素的原子从左至右最外层电子数逐渐增多
C.钠离子核外有三个电子层
D.在化学变化中镁元素容易得到2个电子形成镁离子

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