Across
- 3. the subatomic particles that take part in a chemical reaction.
- 4. a pure substance that cannot be broken into any simpler form.
- 7. the gas evolved during a reaction.
- 8. number the number of protons present in an atom
- 10. the abbreviation for the name of an element.
Down
- 1. number- the number of protons and neutrons of an atom.
- 2. the combining capacity of an element with other elements.
- 5. the subatoic particle with negligible mass.
- 6. the substances formed during a chemical reaction.
- 9. a charged atom.