Test: Kossel-Lewis Approach to Chemical Bonding (NCERT) - NEET MCQ

By sharing of 1electron each, both the atoms of M will get a completed octet.

Valence electrons in P is 2; Valence electrons in Q is 6.

P - 2e^- → P²⁺

Q + 2e^- → Q^2- 

Since both show a valency of 2, the formula for the compound will be PQ.

Number of electrons involved in bonding is 6.

For NO, the octet rule is not followed due to the presence of odd electrons on N.

An electron pair is equally shared between two identical atoms like F — F, H — H.
It is pulled towards a more electronegative atom in case of dissimilar atoms.

In a coordinate or dative bond, electrons required for sharing are contributed by one atom. The atom which contributes the electrons for sharing is called donor atom and the atom which shares the electrons is called acceptor atom.

Step I: Skeleton OCO

Step II: A = 1 x 4 for C + 2 x 6 for O = 4 + 12 = 16 electrons

Step III : Total no. of electrons needed to achieve noble gas configuration (N)
N= 1 x 8 + 2 x 8 = 24

Step IV : Shared electrons, S = N- A = 24-16 = 8 electrons

Formal charge on C atom = Valence electrons
-Lone pair of electrons −1/2× Bonding electrons

formal charge on C atom =0