Across
- 2. number of electrons in Helium
- 6. A chemical r__________
- 8. Negatively charged particle
- 9. Fourth state of matter
- 10. A charged atom or molecule
- 11. Symbol for magnesium
Down
- 1. Name of element Ge
- 3. When metals react with Oxygen
- 4. Inventor of plum pudding model
- 5. Sodium Chloride
- 7. Another name for Group 0 gases