The electron arrangements of two elements are shown.
| Element | Electron arrangement |
|---|---|
| A | 2.8.8 |
| B | 2.8.7 |
Element B reacts with a metal to form ions.
Explain why element A is very unreactive. Predict the charge on an ion formed by element B and explain your prediction.
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.