Which among the following elements of 3rd period shows maximum tendency of forming `dpi-ppi` bond ?

Options

A. Chlorine
B. Silicon
C. Phosphorus
D. Sulphur

Answer

A

Explanation

Among the given elements, Cl has maximum tendency of `ppi-dpi` bonding. On moving across the period, nuclear charge increases and more s, p electrons are added. Due to incomplete shielding of nuclear charge, the atomic size and so the size of 3d-orbitals decreases from `Si to P to S to Cl`. Decrease in size of 3d-orbitals leads to stronger `ppi-dpi` overlap.