Question 2(b)(i)
[Maximum number: 2]
Boron, B , has two isotopes.
State the meaning of the term isotopes.
CAIE IGCSE Chemistry Isotope Definition and Particle Data
Practise defining isotopes precisely and identifying isotope pairs from proton, neutron or electron data without confusing ions with different nuclides.
How this is tested
- define isotopes as atoms of one element with equal proton numbers but different neutron numbers
- identify an isotope pair from particle data by matching protons and comparing neutrons
- separate isotope identity from ionic charge, which changes electrons but not the nucleus