按元素周期表的序号查就行,如果是中学化学的话,一般背到20号元素和常用的主族元素就可以了.
例如He为2号元素,其原子应当有2个电子.
1个某原子中含有几个电子怎么算
1个某原子中含有几个电子怎么算
比如一个He原子中有几个电子,我要过程,详细点,谢谢
比如一个He原子中有几个电子,我要过程,详细点,谢谢
化学人气：101 ℃时间：2020-05-20 20:04:31
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