对于第能层,若它作为原子的最外层,则容纳的电子数最多与—1层

对于第能层,若它作为原子的最外层,则容纳的电子数最多与—1层相同,当它作为次外层,则其容纳的电子数比+1层上电子最多能多10个,则第层为 (  )

A.L能层         B.M能层         C.N能层         D.任意层

答案

B


解析:

原子的最外层最多容纳的电子数为8,根据题意可知-1层最多容纳的电子数也为8,则-1层是L能层,层是M能层。若层为M能层,最多容纳的电子数是18,比最外层多10个,符合题意。

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