Hybrid orbital sets

Hybrid atomic orbitals result by linear combination of atomic orbitals of similar energies on the same atom. Hybrid sets having geometries corresponding to known arrangements of electrons about atoms are given below.
 

Combination of these atomic orbitals from the second shell	gives these hybrid orbitals	having geometry	and these atomic orbitals remain unhybridized
one s and one p	two sp	linear	two p
one s and two p	three sp2	trigonal planar	one p
one s and three p	four sp3	tetrahedral	none

Hybrid orbitals can