Across
- 1. a type of bonding that occurs between a metal and a non-metal
- 4. a reaction that gives out energy or heat
- 7. an element with the symbol O in the periodic table
- 10. the centre of an atom is called this
- 12. group 7 elements are called what?
- 14. the name we use for substances that are made in a chemical reaction.
- 15. a word meaning it can be hammered into shape
- 16. water is neither acid or alkali, it is classed as __________
Down
- 2. a substance made of two or more elements chemically bonded
- 3. acids turn this colour with universal indicator
- 5. a column in the periodic table is called this
- 6. the gas made when an acid and a metal react
- 8. what charge do electrons have?
- 9. lithium and chlorine would react to make lithium _______.
- 11. cooking an egg is a physical or chemical reaction?
- 12. thermal decomposition is a reaction where you break something down using ________
- 13. alkalis turn this colour with universal indicator