Across
- 1. symbole is O
- 4. symbol is C
- 6. symbol is AU
- 7. an educated guess
- 10. symbole of object is N
- 12. + charged particles
- 14. simplest particle
- 15. how much matter is in an object
Down
- 2. center part of atom
- 3. basic unit in matter
- 5. the formula for water
- 8. - charged particles
- 9. symbol is FE
- 11. a group of symbols and numbers
- 13. symbol is AG