Question

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Which statement about the reactivity of the element is true?

It is reactive because it has a full outermost energy level.
It is unreactive because it has a full outermost energy level.
It is unreactive because it has to lose one electron to have a full outermost energy level.
It is reactive because it has to gain one electron to have a full outermost energy level.

Answer 1

It is reactive because it has to gain one electron to have a full outermost energy level.