AQA GCSE Combined Science Trilogy · 8464
Specification 6.4.1.2 · Paper 5
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GCSE Combined Science · key term
A way of representing an atom using its element symbol, with its mass number at the upper left and atomic number at the lower left: .
Used by AQA
Specification 6.4.1.2 · Paper 5
In nuclear notation, the upper-left number is the mass number and the lower-left number is the atomic number.
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