Chemistry A-Level
Ionisation energy and atomic radius
What Ionisation energy and atomic radius means in Chemistry A-Level, as defined for OCR.
Definition of Ionisation energy and atomic radius
Check what you remember
Read the wording for your board, then hide it and explain Ionisation energy and atomic radius in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
As atoms get larger down the group, the outer electrons are further from the nucleus and more shielded, so the first and second ionisation energies fall.
Topics that use Ionisation energy and atomic radius
- Group 2 (OCR A-Level)
Related terms
- Acid indigestion treatment
- Atomic radius and shielding down Group 2
- Balanced symbol equations
- Formation of 2⁺ ions
- Formation of metal hydroxides and hydrogen
- Formation of metal oxides MO
- Group 2 compounds as bases
- Group 2 reactions with dilute acids
Using Ionisation energy and atomic radius in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge