The table links pieces of evidence to changes in the model of the atom.
| Row | Evidence | Model shown to be wrong | Model that replaced it |
|---|---|---|---|
| 1 | atoms can give out negatively charged electrons | Dalton's solid sphere model | plum pudding model |
| 2 | most alpha particles passed straight through gold foil | plum pudding model | nuclear model |
| 3 | a few alpha particles were deflected by more than 90∘90^\circ90∘ | plum pudding model | nuclear model |
Which rows are correct?
1 only
1 and 3 only
2 and 3 only
1, 2 and 3
46 exam-style questions on Edexcel GCSE Chemistry 2.1 Atomic structure, covering 2.1.1 Development of the atomic model, 2.1.2 Structure of the atom and subatomic particles, 2.1.3 Mass number, isotopes and relative atomic mass, and 2.1.4 Calculating relative atomic mass from isotopic abundance. Each one has a worked solution and a mark scheme showing where the marks go.