Here, we draw the orbitals that overlap to hold together a molecule of N2, nitrogen gas, molecular, nitrogen.
When two nitrogen atoms are bonded to each other, there is a SIGMA bond that is the result of an overlap between one sp hydridized orbital from each atom. There are, additionally two PI bonds, which results from a sideways overlap of leftover (unhybridized) 2p orbitals. There are lone pairs of electrons in the other sp hybrid orbitals.
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