Chemistry A-Level
Shared outer-shell electron count
What Shared outer-shell electron count means in Chemistry A-Level, as defined for OCR.
Definition of Shared outer-shell electron count
Check what you remember
Read the wording for your board, then hide it and explain Shared outer-shell electron count in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Elements in the same group share the number of outer-shell electrons, so they show similar chemical properties that change gradually down the group.
Topics that use Shared outer-shell electron count
- Periodicity (OCR A-Level)
Related terms
- Applying the sequence to specific elements
- atomic radius
- Cations and delocalised electrons
- delocalised electrons
- Distinction from mass number and relative atomic mass
- electrostatic attraction
- First ionisation energy
- Forces broken on melting
Using Shared outer-shell electron count 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