Across
- 2. Substance that has a pH less than 7
- 3. Substance that cannot be broken down into any simpler substance by chemical means
- 4. Atom or group of atoms with a negative charge or positive charge
- 6. Smallest particle in matter
- 8. Chemical reaction in which a compound or element rapidly combines with oxygen gas
Down
- 1. combination of pure substances
- 3. Subatomic particle that has a negative charge of 1-
- 5. Subatomic particle that is neutral
- 7. Anything that has mass and takes up space (has volume)
- 9. Substance that has a pH greater than 7