Across
- 4. a change; new substance forms
- 5. physically, not chemically combined
- 6. where products get their atoms
- 9. found in the periodic table
- 10. elements chemically combined
- 13. formed from reactants
- 14. are broken in a chemical reaction
- 15. no atoms are added or ___
- 16. chemical ___ represents an element
Down
- 1. atom __ = to # of protons or electrons
- 2. The basic building block of matter
- 3. a change; properties stay the same
- 7. negatively charged particles
- 8. The centre of an atom
- 11. positively charged particles
- 12. neutral subatomic particles
- 17. protons plus neutrons = atomic ____