Across
- 2. during a double displacement reaction, _____ are exchanged
- 5. a magnesium ribbon burns in _____ colour
- 7. most reactive metal
- 8. reaction where light causes the breakdown of a subtance
- 9. common name of calcium hydroxide
- 11. a substance that undergoes a chemical change in a reaction
- 12. 2Mg+O2 = 2MgO is a _______ reaction
Down
- 1. substance that speeds up a chemical reaction
- 2. a substance which turns from green to white when heated
- 3. an insoluble solid formed during a double displacement reaction
- 4. CaO + H20 is a ______ reaction (exothermic/endothermic)
- 6. gas evolved when an acid reacts with a metal
- 10. brown gas produced during the decomposition of lead nitrate