Across
- 1. Radius Neon
- 4. The smallest part of a element
- 6. Metal lithium
- 8. Cerium
- 9. Sodium cation
- 12. The number of protons in a atom
- 13. Calcium
Down
- 2. Boron
- 3. Metal Iron, copper
- 5. A clue for element
- 6. URANIUM
- 7. Silver
- 10. Carbon and sulfur
- 11. Dmitri Mendeleev
- 14. Helium