How many moles of argon are in 1.806 x 1024 atoms of argon? O A. 0.3 moles
O B. 1.0 mole
O C. 3.0 moles
D. 30 moles

1. o2(g)as a product

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.