Element J has two isotopes, with mass numbers of 10 and 11. The relative atomic mass of element J is 10.8. What can be deduced about the atoms of element J?
Most of the atoms of element J have a mass number of 11
Most of the atoms of element J have a mass number of 10
Equal numbers of the atoms have mass numbers of 10 and 11
All of the atoms of element J have a mass number of 10.8
40 exam-style questions on AQA GCSE Chemistry 1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, covering 1.1.1a Atoms, elements and compounds, 1.1.1b Half equations and ionic equations, 1.1.2 Mixtures, 1.1.3 The development of the model of the atom (common content with physics), 1.1.4 Relative electrical charges of subatomic particles, 1.1.5 Size and mass of atoms, 1.1.6 Relative atomic mass, and 1.1.7 Electronic structure. Each one has a worked solution and a mark scheme showing where the marks go.