Why is the first ionisation energy lower in barium compared to calcium?

Barium has more electrons shells than calcium, so the nuclear shielding is stronger, and the outmost electrons are further away from the nucleus. This results in a weaker attractive force between the electron and the nucleus, so a smaller energy is required to remove it. 

Answered by Joseph F. Chemistry tutor

14559 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

How do you determine the shape and bond angle of an ammonia molecule?


Calculate the pH of 0.1M Benzoic Acid (C6H5COOH). Ka = 6.3x10-5 M


Why do transition metals form coloured solutions?


Elements in the periodic table show a trend in atomic radius. State and explain the trend in atomic radius from Li to F.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences