Across
- 3. element in the bottom right corner of the periodic table
- 4. element in period 4 group 9
- 5. elements on the far left side of the periodic table
- 8. element symbol is Fe
- 13. element group between alkali earth metals and halogens
- 15. atomic number is 2
- 16. element symbol is N
- 18. element in period 2 group 13
- 19. element symbol is O
- 20. atomic number is 10
Down
- 1. element symbol is Au
- 2. element in the bottom left corner of the periodic table
- 6. element under neon
- 7. elements between alkali metals and transition metals
- 9. the element under hydrogen
- 10. atomic number is 1
- 11. element symbol is N
- 12. elements between transition metals and noble gasses
- 14. element group with full valence levels
- 17. element symbol is C
