The table shows the atomic numbers of four elements, E, G, J and L. These letters are not the chemical symbols of the elements.
| Element | Atomic number |
|---|---|
| E | 3 |
| G | 9 |
| J | 18 |
| L | 19 |
Deduce the group of the periodic table that each element is in.
Reactivity increases down group 1 but decreases down group 7. Explain these two opposite trends.
Potassium reacts with bromine to form potassium bromide. Write the half equations for the changes that happen to potassium atoms and to bromine molecules.
Explain which element is reduced in the reaction between potassium and bromine.
Francium is at the bottom of group 1 and astatine is at the bottom of group 7. Predict the formula of the compound formed when francium reacts with astatine.
41 exam-style questions on Edexcel GCSE Chemistry 7.1 Group 1, covering 7.1.1 Classifying elements by group in the periodic table and 7.1.2 Properties and reactions of the alkali metals. Each one has a worked solution and a mark scheme showing where the marks go.