( I FIGURED IT OUT SO FREE POINTS) how many electrons are in an atom that has an atomic number of 34, an atomic mass of 74, and a charge of-2

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.