Almost all of the mass of an atom is in its nucleus, and the nucleus fills only a tiny part of the volume of the atom. What does this tell you about the nucleus?
Its density is far greater than the average density of the whole atom.
Its density is far smaller than the average density of the whole atom.
Its density is exactly the same as the average density of the atom.
Its density depends on how many electrons surround that nucleus.
40 exam-style questions on AQA GCSE Physics 4.1 Atoms and isotopes, covering 4.1.1 The structure of an atom, 4.1.2 Mass number, atomic number and isotopes, and 4.1.3 The development of the model of the atom (common content with chemistry). Each one has a worked solution and a mark scheme showing where the marks go.