If methane is imaged by molecular orbitals, this structure will correspond to a tetrahedron, but now if you have the (+) CH3 (methyl cation) where the carbon has 6 electrons in its valence shell (3 bonding electron pairs) and the methyl anion (-)CH3 where carbon has 8 electrons in its shell. valence (3 pairs of bonding electrons and two antibonding) What will its molecular geometry be like?