下列说法中错误的是（）

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下列说法中错误的是（）

A：元素周期表中有7个主族，7个副族

B：稀有气体元素原子的最外层电子数均为8

C：氢是原子半径最小的元素

D：氧元素位于第2周期ⅥA族

上一题下一题 0.0难度选择题更新时间:2018-11-30 04:23:42

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B

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Look at this photo. The girl is from Beijing. She is six years old. She is not tall and she has short black hair. She has big eyes, a small nose and a wide mouth. She is in old clothes. Now she is lost（丢失了）. Please help us find her. Our phone number is （010）8699-8886. Thanks!
阅读短文，完成下列表格关于the girl的信息，每个空格一词。

From	____	Looks
Age	Six	She is ____ and she has short ____ hair. Her eyes years are big. She has a ____ nose and a ____mouth.
Tel	（010）8699-8886

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