Explain the formation of Ammonia molecule by using Lewis notation.

Explain the formation of Methane molecule by using Lewis notation.

Explain the formation of Mirage .

Explain the formation of a rainbow.

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