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【单选题】
1868年，俄国化学家门捷列夫制作出了第一张元素周期表，揭示了化学元素间的内在联系，这成为化学的重要里程碑之一。下列有关元素周期表的说法中错误的是 [     ]
A.
元素周期表中ⅡA族全部是金属元素
B.
元素周期表中第二、三、四周期包括的元素种类数分别是8、8、18
C.
35 Br位于元素周期表中第四周期ⅦA族
D.
中学课本上的元素周期表是常用的一种形式，也是唯一的一种形式
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