Silicon has a strong tendency to form polymers like silicones. The chain length of silicone polymer can be controlled by adding

Boric acid is an acid because its molecule

Catenation i.e., linking of similar atoms depends on size and electronic configuration of atoms. The tendency of catenation in Group 14 elements follows the order:

Ionisation enthalpy (∆_i H₁ kJ mol^-1) for the elements of Group 13 follows the order.

In the structure of diborane