Two atoms, J and K, are halogens. The table shows information from models of the atoms.
| Atom | Number of occupied electron shells | Number of electrons in the outer shell |
|---|---|---|
| J | 2 | 7 |
| K | 4 | 7 |
A student says, ‘Atom K is more reactive than atom J because it has more occupied electron shells.’
Explain why the student's conclusion is incorrect. Use the information in the table and ideas about electrons.
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.