Across
- 5. the number of protons in the nucleus of an atom.
- 10. a new substance is mad through forming or breaking of chemical bonds.
- 13. What makes up everything
- 14. all atoms want 8 of these
Down
- 1. neutral particles
- 2. positively charged
- 3. This is a reaction when atoms combine to make a compound
- 4. good conductors, gold, silver, copper, tin, etc.
- 6. nothing new is formed, only change.
- 7. Extremely unreactive gasses
- 8. smallest unit into which matter can be divided
- 9. 1st column on periodic table
- 11. negatively charged particles
- 12. charged particle that results in loss or gain of an atom.