Chemistry A-Level
Outer-shell electron count
What Outer-shell electron count means in Chemistry A-Level, as defined for OCR.
Definition of Outer-shell electron count
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Reference: OCR
The number in the outermost shell is found by counting the electrons removed before the first big jump.
Topics that use 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 Outer-shell electron count in the exam
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