Which orbital is non directional?
They are non directional because they are spherical in shape and probability of finding electrons at a particular distance from the nucleus is same in all directions.
Define covalent bond and covalency . Write the conditions for covalency .
Covalent bond is defined as the bond existing between two atoms formed by the mutual sharing of electrons by the both atoms.
Covalency is the meausre of number of valence electrons that can be actively shared by an atom in forming a covalent bond.
The conditions for forming a covalent bond are as follows:
Reference: Write 3 Necessary Conditions For The Formation Of A Covalent Bond - Chemistry Q&A (byjus.com)