Chemistry A-Level
Distinction from mass number and relative atomic mass
What Distinction from mass number and relative atomic mass means in Chemistry A-Level, as defined for OCR.
Definition of Distinction from mass number and relative atomic mass
Check what you remember
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Reference: OCR
Proton number, nucleon number and relative atomic mass are different quantities, and only proton number gives the modern sequence.
Topics that use Distinction from mass number and relative atomic mass
- Periodicity (OCR A-Level)
Related terms
- Applying the sequence to specific elements
- atomic radius
- Cations and delocalised electrons
- delocalised electrons
- electrostatic attraction
- First ionisation energy
- Forces broken on melting
- Giant lattice structure
Using Distinction from mass number and relative atomic mass in the exam
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