Which among the group -15 elements does NOT exist as tetra atomic molecule?

Step-by-step solution

Nitrogen differs from the rest of the members of this group due to its smaller size, high electronegativity, high ionization enthalpy and non-availability of d orbitals. Nitrogen has unique ability to form P π − P π multiple bonds with itself and with other elements having a small size and high electronegativity (e.g., C ,O). Heavier elements of this group do not form P π − P π bonds as their atomic orbitals are so large and diffuse that they cannot have effective overlapping