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English[en]
In the alkali metals, the outermost electron only feels a net charge of +1, as some of the nuclear charge (which is equal to the atomic number) is cancelled by the inner electrons; the number of inner electrons of an alkali metal is always one less than the nuclear charge.
Chinese[zh]
碱金属价电子只受到一个+1的净电荷的作用,因为部分有效核电荷被内层电子(除去最外层的所有电子)所抵消,而碱金属内层电子的数量永远比核电荷数少一个。

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