【名词&注释】
原子结构(atomic structure)、非金属(nonmetal)、稀有气体原子(rare-gas atoms)
[单选题]原子结构中,最外层电子数是1的原子是
A. 非金属原子
B. 金属原子
C. 不能确定
D. 稀有气体原子
查看答案&解析查看所有试题
学习资料:
[单选题]Which of the following is true according to the passage?
A. There are about 2,500 stars in the sky.
B. Humans want to do nothing to reduce light pollution.
C. Sea turtles always get lost and die from tiredness.
D. Something has been done to reduce light pollution.
[单选题]( )
A. careful
B. carefully
C. proper
D. properly
本文链接:https://www.51ksbd.net/show/nxx963.html