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.

Exam points

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

[Maximum number: 1]

This question is about elements X, Y and Z.

What term is used to describe atoms of the same element with different numbers of particles in the nucleus?

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2.3.1—Isotopes as different atoms of the question 1