Question

Use Slater's rules to estimate Zeff for the germanium, arsenic, selenium, bromine and krypton atom

Answer 1

Slater' rules: Zeff - z - shielding by inner elections Net attraction Attraction by nuber of protons towards nevelus. * of the outer most electron is present in nth shell, then shielding by other with shell electrons is 0.35. #shielding by (n-11th shell electrons = 0.85 * for rest of inner shells electron shielding = 1. Cermanium: Atomic number = 32 32 Ge: 15² 28² 286 38² 306 300 48² ap² (n-3) (1-2) (n-1) (with) 241 8x1 1880.85 3x0.35 o= 10+ 15.3 +1.05 = 26.35 Zeft = 32-26.35 Zeft = 5.65 Arsenic! Atomic number a 33 33 As : 15² 25² 2p6 35 306 30 10 45² 403 2x1 8X1 18 80.85 4x0.35 o= 10+ 15.3 +1.4 = 26.70 Zoff = 33-26.70 = 16.30 of NOTE: As the atomic number increase in a horizontal row Periodic table Zeff is increases by 0.65 so, 34 se 35Br 36 kr Zeht = 6.95 7obo 8.25