Use vespr theory to predict the molecular shape of the following molecules.

4. carbon dioxide (co2)
5. methane (ch4)
6. the nitrate ion [no3]−

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.