Explain the formation of `alpha` -bonds in molecules with atleast two examples

In the formation of covalent bond

Explain the formation of Ammonia molecule by using Lewis notation.

Explain the formation of Methane molecule by using Lewis notation.

Explain the formation of uni, di, tri negative ions with examples.

Explain the terms "adsorption" and "absorption" with at least two examples.

What is the name given to inter mixing of atomic orbitals to form new orbitals. Explain the formation to form new orbitals. Explain the formation of following molecules by using that process. (a) BeCl_2 (b) BF_3

Explain the formation of the following molecules using valence bond theory. N_2 molecule

Explain the formation of the following molecules using valence bond theory. O_2 molecule

Explain the formation of sp and sp^2 hybridization using examples.

Explain the formation of Coordinate Covalent bond with one example.