What is the amount (mol) of pure substance in 10.7 g of aluminum? Assume the molar mass of aluminum is 26.98g/mol

Yes i think so not 100 percent sure though

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.