Group s-block

Main group (s-block and p-block) elements generally form ions with closed shell configurations (e.g. Na+, Mg2+, Al3+) in which all electrons have been lost from the valence shell, an anions (F-, O2-) in which valence shell has been filled. 

For main-group, s-block metals, remove all electrons with the highest n value. 

Bent, in preparation what Bent has actually written here is the shorter the group s block . The word shorter normally indicates the vertical dimension of a block which is not what the author intended. This error was later confirmed to me by the author via personal correspondence. 

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