Lithium, sodium and rubidium are three metals in Group 1 of the Periodic Table.
A small piece of each metal is placed on water in separate large troughs. Complete the table by giving the correct metal (lithium, sodium or rubidium) for each description.
| Description of reaction | Metal |
|---|---|
| Reacts extremely rapidly, with an explosive reaction on contact with water | |
| Fizzes steadily and moves on the surface, keeping its solid shape | |
| Melts into a silvery ball and fizzes rapidly as it darts across the water |
Give the name and formula of the gas formed when sodium reacts with water.
Name:
Formula:
Give the name and formula of the compound formed when lithium reacts with water.
Name:
Formula:
Describe how you could show that an alkaline solution is formed when rubidium reacts with water.
21 exam-style questions on Edexcel IGCSE Chemistry Group 1 (alkali metals) – lithium, sodium and potassium. Each one has a worked solution and a mark scheme showing where the marks go.