Why 1st ionisation energies of 5d elements are higher than those of 3d or 4d elements

Asked by  | 18th Aug, 2008, 09:54: AM

Expert Answer:

1st ionisation energies of 5d elements are higher than those of 3d or 4d elements this is due to the greater effective nuclear charge acting on outer valence electrons because of weak shielding by 4f electrons.

Answered by  | 20th Aug, 2008, 11:28: AM

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