Across
- 2. a change in shape,size and substance
- 4. a substance that can be broken down
- 5. protons plus neutrons
- 7. charged central core of an atom, containing protons and neutrons
- 10. a substance reacts to other substance
Down
- 1. there when a start of a chemical reaction
- 3. two and more elements
- 6. describes the element
- 8. Cannot be broken down by any chemical reaction
- 9. a substance made out of various types of particles