Chlorine (Cl) element will have more valence electrons than oxygen, therefore option (c) is correct.
What do you mean by valence electron?
The number of electrons an atom needs loses or gain to reach the octet or ensure stability is known as valence electron.
Valence electrons are electrons in the outer shells that are not filled.
The valence electron exists exclusively in the outermost electron shell
of the main group elements.
In the inner shell of a transition metal, a valence electron can exist.
Chemically, an atom with a closed shell of valence electrons is usually inert.
Chlorine (Cl) element will have more valence electrons than oxygen, therefore option (c) is correct.
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