Topic 02Chemistry

S1.2 The Nuclear Atom

Go inside the atom — discover the three subatomic particles, master nuclide notation (Z and A), and understand how isotopes arise from different neutron counts.

Practice questions

What's Inside an Atom?Sign up

Protons, Neutrons & Electrons · Atomic Number (Z) & Mass Number (A)

30 min

Same Element, Different Atom — IsotopesSign up

Isotopes

25 min

The Molecular Weighing Machine — Mass SpectrometrySign up

The Mass Spectrometer · Mass Spectra & Relative Atomic Mass

35 min