Across
- 5. subatomic particle that defines the element
- 7. has gained or tends to gain electrons
- 9. model that is useful, but not accurate in showing electrons in circular orbits
- 10. a number used to balance a chemical equation
- 14. charge of ions that have gained electrons
- 16. discovered the nucleus through a “gold foil” experiment
Down
- 1. subatomic particle with negligible mass and negative charge
- 2. charge of ions that have lost electrons
- 3. subatomic particle that has mass but no charge
- 4. a number used to indicate numbers of atoms in a chemical formula
- 6. an “ingredient” or substance used in a reaction
- 8. same protons, different neutrons
- 11. based on data, explains and predicts
- 12. has lost or tends to lose electrons
- 13. a substance produced by a chemical reaction
- 15. type of change where new substances are produced