Question

The electron-dot structure (Lewis structure) for which of the following molecules would have two unshared pairs of electrons on the central atom?

(A) H2S

(B) NH3

(C) CH4

(D) HCN

(E) CO2"

Answer 1

The electron-dot structure for NH3 would have two unshared pairs of electrons on the central atom.

Step-by-step explanation:

The electron-dot structure (Lewis structure) for NH3 would have two unshared pairs of electrons on the central atom.

NH3 has four electron groups around nitrogen, three bonding pairs, and one lone pair. The lone pair creates a bent molecular geometry, with the hydrogen atoms and the lone pair directed towards the corners of a tetrahedron.