Chemistry A-Level
Subshell notation and principal quantum numbers
What Subshell notation and principal quantum numbers means in Chemistry A-Level, as defined for OCR.
Definition of Subshell notation and principal quantum numbers
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Reference: OCR
Configurations are written in subshell notation using s, p and d labels with the correct principal quantum number, for example Mg as 1s² 2s² 2p⁶ 3s².
Topics that use Subshell notation and principal quantum numbers
- 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 Subshell notation and principal quantum numbers in the exam
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