The table gives the mass numbers and percentage abundances of the isotopes in two samples of the same element.
| Sample | Mass number | Abundance |
|---|---|---|
| A | 46 | 8% |
| A | 47 | 7% |
| A | 48 | 85% |
| B | 46 | 15% |
| B | 47 | 10% |
| B | 48 | 75% |
Calculate the relative atomic mass, ArA_rAr, of sample A.
Compare the relative atomic mass of sample B with that of sample A, explaining your answer.
93 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.