Question

1. ) How many electrons in an atom have the following quantum numbers? n=3, l=1 b) Among the 3d and 3p orbitals which orbital will experience more effective nuclear charge from the nucleus. c) Give the electronic configuration of an element with atomic number

Answer 1

Mass of one electron = 9.11×10-31kg ∴ 1g = 10-3 kg = (1/9.11×10-31)×10-3 electrons = 1.098×1027 (ii) Mass of one electron = 9.11×10 -31kg ∴ Mass of 1 mole of electrons = (9.11×10-31)×(6.022×1023)= 5.48×10-7 kg Charge on one electron = 1.602×10-19 coulomb ∴ Charge on 1 mole of electrons = (1.602×10-19)×(6.022×1023) = 9.65×104 coulombs.