Which of the following shows the least chemical reactivity?
A
An atom with a partially filled outermost shell
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B
An atom with no electrons
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C
An atom with a fully filled outermost shell
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D
An atom with a half-filled shell
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Solution
The correct option is C
An atom with a fully filled outermost shell
Atoms react with other atoms in order to form compounds by filling their outer most shell. An atom which has fully filled outermost shell no longer require to do so.