A comparison is made between potassium and rubidium.
| Element | Symbol | Electronic structure |
|---|---|---|
| Potassium | K | 2.8.8.1 |
| Rubidium | Rb | 2.8.18.8.1 |
Explain why rubidium is predicted to react more vigorously with water than potassium.
Sulfur, S, is in Group 6.
Give the formula of the compound formed when rubidium reacts with sulfur.
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.