Question

An atom having a completely filled outermost shell:

• A. Shows little chemical activity
• B. Has more combining capacity
• C. Has a valency which is a non-zero number
• D. Has more combining capacity and a valency which is a non-zero number

Answer 1

The correct option is A

Shows little chemical activity

The atom with completely filled outermost shell shows little chemical activity i.e. inert. It has stable octet configuration (8 electrons in outer most shell) so it doesn't react. So no combing capacity and the valency is zero.