when 80 g of a certain metal at 90 degrees c was mixed with 100 g o faster at 30 C the final equilibrium temperature of the mixture was 36 C What is the specific heat of the metal

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.