Across
- 3. Pure substance that only contains one type of atom
- 5. Mass of an atom
- 7. Pure substance
- 8. Smallest part of an element
- 10. Impure combinations of elements
- 12. Negative_Charge
Down
- 1. Smallest part of a compound
- 2. Impure, not consistent substance
- 4. Number of protons and neutrons in an atom
- 6. Number of protons in an atom
- 9. Positive_Charge
- 11. No/Neutral_Charge
- 13. Two or more elements that are chemically combined