Question

Atoms will lose or gain valence electrons ____ .

• A. to make their outer shells full with eight electrons
• B. to make their inner shells full with eight electrons
• C. to make their outer shells full with eighteen electrons
• D. to make their inner shells full with eighteen electrons

Answer 1

The correct option is A to make their outer shells full with eight electrons

Atoms will lose or gain valence electrons to make their outer shells full with eight electrons i.e. fill the s and p orbitals of the outermost shells before filling the d and f orbitals of inner shells.