Group – 15 (VA) N, P, As, Sb, Bi
Elements of this group are called Pnicogens. (Greek, pnigmos-suffocation, many compounds of the group elements have suffocating oduour, so this name). There is a transition from non-metal to metal.
Nitrogen and Bi do not show allotropy whereas P, As and Sb have allotropes.
- Nitrogen is diatomic gas, N2 at NTP. It is due to very effective (p — p)π bonding in N2.
N 2s22p3 i.e., three unpaired electrons in p — orbitals. There are one σ and two π bonds in N2. Nitrogen is sp-hybridized.