Which of the following materials would not be used as a dielectric material in a capacitor? Tantalum, polystyrene, paper or aluminum foil

30litre of li2o is 1.0002mole approximately 1 mole

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.

The answer is accuracy