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Atoms and isotopes key terms
Study Atoms and isotopes with curriculum-aligned Key Terms resources, practice links, and exam-focused support.
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key terms
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Topic
Atoms and isotopes
Key terms
Bohr model
A model of the atom where electrons orbit the nucleus at specific distances or energy levels.
nuclear model
A representation of the atom that includes a small, dense nucleus containing protons and neutrons, with electrons orbiting around it.
nucleus
The small central part of an atom that contains protons and neutrons.
proton
A positively charged subatomic particle found in the nucleus of an atom.
neutron
A subatomic particle found in the nucleus of an atom, with no electrical charge.
Chadwick's experiment
The experiment conducted by James Chadwick that led to the discovery of the neutron.
plum pudding model
An early model of the atom where negative electrons are embedded in a positively charged 'soup'.
nuclear model
A model of the atom that describes a small, dense nucleus containing protons and neutrons, with electrons orbiting around it.
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