Chemistry A-Level
s and p subshell order
What s and p subshell order means in Chemistry A-Level, as defined for OCR.
Definition of s and p subshell order
Check what you remember
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Reference: OCR
The added electron fills the s subshell before the p subshell, with the 2p subshell filling from B to Ne and the 3p subshell filling from Al to Ar.
Topics that use s and p subshell order
- 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 s and p subshell order in the exam
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