Across
- 3. Two or more atoms connected
- 6. Smallest part of a substance
- 8. A list of all the elements
- 9. Positive charge
- 12. The centre of an atom
Down
- 1. Solid becoming a liquid
- 2. Most dense state of matter
- 4. Two or more elements connected
- 5. What very hot water does
- 7. Negative charge
- 10. Liquid becoming a solid
- 11. State of matter that has no volume