Elements A and B are both in Group 1. The table gives the number of occupied electron shells in each atom.
| Element | Number of occupied electron shells |
|---|---|
| A | 3 |
| B | 5 |
One student predicts that A will react more vigorously with water because its outer electron is nearer the nucleus. Another predicts that B will react more vigorously. Evaluate these predictions.
113 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.