BRAINCAKE

Atomic structure

AQA GCSE Combined ScienceTopic 21 of 247 lessons

Revision notes for Atomic structure in AQA Combined Science: Trilogy (8464). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.

  1. The structure of an atomAtoms are very small.
  2. Mass number, atomic number and isotopesAn atom has the same number of electrons as protons, so the positive and negative charges cancel and the atom has no overall charge.
  3. The development of the model of the atom (common content with chemistry)New experimental evidence can lead to a scientific model being changed or replaced.
  4. Radioactive decay and nuclear radiationSome atomic nuclei are unstable.
  5. Nuclear equationsA nuclear equation shows a radioactive decay.
  6. Half-lives and the random nature of radioactive decayRadioactive decay is random.
  7. Radioactive contaminationRadioactive contamination is the unwanted presence of materials containing radioactive atoms on other materials.

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