Across
- 1. Fluorine, chlorine, Iodine
- 3. Carbon, Silicon
- 5. Oxygen, Sulfur, Selenium
- 7. Boron, Aluminum
- 8. Indicates # of energy levels
- 9. creator of the periodic table
- 10. Helium, Neon, Argon, Krypton, XENON
- 11. Indicates valance electrons
Down
- 2. Nitrogen, Phosphorous, Bismuth
- 4. Lithium, Hydrogen
- 6. Calcium, Magnesium