Question

The electronic structure of four element a, b, c and d are
(i) $1s^2$
(ii) $1s^2,2s^2$
(iii) $1s^2,2s^{2}2p^5$
(iv) $1s^2,2s^{2}2p^6$
The tendency to form bond is greatest in:

• A. (i)
• B. (ii)
• C. (iii)
• D. (iv)

Answer 1

The correct option is C (iii)

In i,ii and iv s-orbital and p orbital are completely filled so they have stable configuration and have no tendency to gain electron while in (iii) the two p orbitals are doubly filled while one orbital is singly filled so it has the greatest tendency to gain one electron and have 6 electrons in p orbital to become stable.