Across
- 6. gave modern periodic table
- 9. Iron
- 12. krypton
- 13. CO
- 14. first one to define atoms
- 16. focus on temperature,volume
- 17. Mg2+
Down
- 1. bromine
- 2. A negatively charged particle
- 3. A positively charged particle
- 4. Focus on pressure,volume
- 5. silicon
- 7. the numbers of protons
- 8. outermost electrons
- 10. CaCl2
- 11. Cl-
- 15. Thorium