OCR GCSE Chemistry B · J258

Calculating particle numbers

What you need to know

Calculate the numbers of protons, neutrons, and electrons in atoms using the atomic number and mass number of isotopes or data from the Periodic Table.

Revision notes

1
Calculating particle numbers
7 key terms

Practise with past papers Key terms & definitions

Previous subtopicRelating size to physical objects Next topic: The Periodic Table and elementsPeriodic Table arrangement