Elements A and B have these electron arrangements.
| Element | Electron arrangement |
|---|---|
| A | 2.8.7 |
| B | 2.8.2 |
A compound is formed when A reacts with B. State the formula of the compound and explain how the bonding forms.
122 exam-style questions on OCR GCSE Chemistry 2.2 Bonding, covering 2.2.1 Metals, non-metals and the Periodic Table, 2.2.2 Types of chemical bonding and dot and cross diagrams, 2.2.3 Limitations of bonding models, and 2.2.4 Reactivity, atomic number and the modern Periodic Table. Each one has a worked solution and a mark scheme showing where the marks go.