How many unhybridized 2 orbitals remain on an atom that has hybrid orbitals?

Question

In an  hybridized atom, we saw that there was one unhybridized 2 orbital. How many unhybridized 2 orbitals remain on an atom that has  hybrid orbitals?

Answer 1

I think you are talking about 2p orbitals.

For example, if you take a carbon atom, it has one 2s orbital and 3 2p orbitals; 2p_x, 2p_{y and} 2p_z before hybridization.

if you combine one 2s orbital + one 2p orbital you will have two sp hybrid orbitals(arranged in linear 180) and, two unhybridized 2p orbitals left.

if you combine one 2s orbital + two 2p orbitals(2p_x + 2p_y ) you will have three sp² hybrid orbitals(arranged in trigonal planar 120) and, one unhybridized 2p orbitals left.

if you combine one 2s orbital + all 2p_x, 2p_{y and} 2p_z three of them, you will have four sp³ hybrid orbitals(arranged in tetrahedral - 109.5) and, no unhybridized 2p orbitals left.