Question

which has a bigger atomic size cl or cl-

Answer 1

Cl- has bigger atomic size.Because cl has 17 electrons while cl- has 18 electrons..

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Answer 2

Cl atom has bigger Atomic size than that of Cl- anion. Because in Cl- anion their is one extra electron and due to attraction force by nucleus the outermost orbit get closer toward nucleus causing the atom size to be decreased.
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