AQA GCSE Combined Science Trilogy · 8464
Specification 5.1.1.5, 5.1.2.2, 6.4.1.2, 6.4.2.2 · Paper 3, Paper 5
Revise: Size, Mass, and IsotopesThe mass number is the total number of protons and neutrons. Electrons are not included in this count.
- Revise: Development of the Periodic Table
The total number of protons and neutrons in the nucleus of an atom.
- Revise: Atomic Number, Mass Number and Isotopes
1 more note
- Revise: Nuclear Equations
The total number of protons and neutrons in a nucleus, written at the top left of its symbol.