A bond arises from "sideways" overlap of two parallel p orbitals. The electron density lies above and below a plane containing the 2 nuclei that is perpendicular to the orbitals. + p-orbital atom1 p-orbital atom2 bond If an atom has sp3 hybridization in a molecule: The maximum number of σ bonds that the atom can form is The maximum number of p-p bonds that the atom can form is