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4.1.2 Mass number, atomic number and isotopes
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Atomic number and mass number

Atomic number and mass number

The atomic number, ZZZ, is the number of protons in the nucleus. It identifies the element because every atom of a particular element has the same number of protons.

4.1.2 Mass number, atomic number and isotopes Lesson

  1. GCSE
  2. /Physics
  3. /4.1.2 Mass number, atomic number and isotopes

Step-by-step lessons on AQA GCSE Physics 4.1.2 Mass number, atomic number and isotopes. Each one builds up to exam-style questions. Build a strong grip on equations, units and Key Stage 3 fundamentals before tackling the more demanding topics like electromagnetism, the particle model of matter and space physics.

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