Across
- 6. unequal sharing of electrons
- 7. variable that is changed
- 10. smallest unit of matter
- 12. energy absorbed
- 14. no definite shape or volume
- 15. variable that is observed/measured
- 18. positive charge, located in nucleus
- 19. made of two or more substances
- 20. definite shape and volume
Down
- 1. energy released
- 2. definite volume, no definite shape
- 3. equal sharing of electrons
- 4. form in a chemical reaction
- 5. electrons are given and taken
- 8. electrons in outer energy level
- 9. react in a chemical reaction
- 11. electrons are shared
- 13. negative charge, around nucleus
- 16. no charge, located in nucleus
- 17. # of protons + # of neutrons