from 2023 spec
| Front | Explain how a catalyst increases the rate of a reaction. (2) |
| Back | particles move faster (1)particles collide more often (1) |
| Front | Describe the reactivity down Group 7... |
| Back | Decreases in reactivity down the group - it's harder to gain an extra electron because the outer shell's are further from the nucleus - higher melting pointing. |
| Front | Describe the properties of metals... (3) |
| Back | - high melting/ boiling points (strong forces of attraction)- good conductor of heat and electricity (delocalised electrons)- malleable, soft (layers of atoms can slide over each other whilst maintaining the atracttion forces) |