Atomic Structure

Atomos is an ancient Greek word meaning 'indivisible' or 'cannot be cut'. Atoms are the building blocks of matter; they are the smallest particles that when combined together have the properties of a particular chemical element, or compound.


  • Electron configuration

    Topic 2.2 Introducing a new model of the atom, which is a development of Bohr's model.

  • Electrons in atoms

    Topic 12.1 Exploring what ionisation energies can tell us about the nature of the atom.

  • The nuclear atom

    Topic 2.1 Introducing the principle of sub-atomic particles.