Across
- 2. a characteristic of a substance
- 8. a subatomic particle with a negative charge
- 9. a subatomic particle with no charge
- 10. the number of protons or electrons
Down
- 1. a change that results in a new substance
- 3. a subatomic particle with a positive charge
- 4. substances that can't be broken down into a simpler form
- 5. horizontal rows on the periodic table
- 6. how compact a substance is
- 7. columns of elements on the periodic table