What mass in grams of glucose (MM = 180.2 g/mol) would need to be dissolved in 100.0 g of water to decrease the vapor pressure of the
solution to 22.0 torr? (Pº of water is 23.5 torr)

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.

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium