最外层电子

thermoelectron───n.[电子]热电子

interelectron───电子间

thermoelectrons───n.[电子]热电子

free electron───[物]自由电子

midterm elections───中期选举

photoelectron───n.[物][电子]光电子

primary electron───[物][电子]原电子

The outermost electron is shielded from the nucleus.───原子核对最外层电子的作用受到屏蔽。

the first column all have one electron in their outermost shell. Those in the second column have two outer electrons, and so on.───第一列元素最外电子层内均有一个电子，第二列元素则含有两个电子，依此类推。

same period, from left to right, elemental extranuclear electron number of the same, the outermost electron number were increased, the atomic radius decreasing (neutral element except).───同一周期内，从左到右，元素核外电子层数相同，最外层电子数依次递增，原子半径递减(零族元素除外)。

Except for the transitional elements, valency electrons are in the outermost electron shell.───除去过渡元素外, 价电子位于最外面的电子层.

Except for the transitional elements, valency electrons are in the outermost electron shell.

The outermost electron is shielded from the nucleus.