Across
- 1. a negatively charged subatomic particle located in the outer shells
- 7. a change where no new substances are formed and is relatively easy to reverse
- 8. a way to represent a chemical reaction in the form of symbols and formulas
Down
- 2. a change where a new substance is formed
- 3. the substances that go into a chemical reaction before it has happened
- 4. the smaller number that tells you how many atoms are in one molecule of a substance
- 5. the part in a chemical equation that shows you what is produced
- 6. the big number that tells you how many molecules there are in a chemical formula
- 7. a positively charged subatomic particle located in the nucleus