Question

Based on the table with ionization energies (eV) for 1s and 2s electrons given at the end, determine the Z_effthat is experienced by the electron in the 2s atomic orbital in Li and Be. Also, comment on your findings.

H H e Li 13.6 24.6 5.4 9.3 8.311.314.5 13.6 17.4 21.6 5.1 54.4 75.6 18.2 25.2 24.429.6 35.1 35.0 41.0 47.3 122.5 153.9 37.947.9 47.454.9 62.7 63.4 71.6

The solution is 1.26 (units not mentioned) for Li and 1.65 (units not mentioned) for Be.

Hint: Substitute Zeff in Z for H-like atoms .

Answer 1

oT 久 6. RH ( ) where Rad beata t era' conatant OuT ayuant um mwn ber mamt ummum

Fom Li (65x 10 19 8, 652x10 クスeff

RH = 2-18x 10-18丁 2 r2 I g 1.49 x 10 x 4 2-18 X 10 3 2 굿eff 2 굿eff= 1.65 ラヌeff =2-734