Explain why the first ionisation energy of barium is less than the first ionisation energy of calcium.

Barium is in the sixth period, Calcium is in the fourth. Therefore, Barium experiences more shielding, resulting in weaker attraction of the nucleus for outermost electrons.

JF
Answered by Joseph F. Chemistry tutor

4887 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

Why is 2-trichloroethanoic acid such a strong acid?


What is a bond?


The lattice enthalpies of calcium oxide and magnesium oxide are different. Comment on this difference.


What's the difference between an electrophile and a nucleophile?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning