Periodic table
Across
- 2. Element has an electronic configuration of 2, 8, 8, 8, 8, 2
- 3. Number of electrons found in the first electron shell
- 6. Another name for group VII
- 8. Element has an electronic configuration of 2, 8, 8, 1
- 10. Elements found in group VII, period IV
- 11. Vertical column in the periodic table
- 14. Element has an electronic configuration of 2,8 3
- 15. Element is used in plastic surgery
- 17. Most reactive non-metal
- 20. Element is a yellow/green gas
- 21. Element is found in balloons
Down
- 1. Charge of +1
- 4. Element is found in period III and has 5 valence electrons
- 5. Name given to elements with the same number of protons but different number of neutrons
- 7. Charge of 0
- 9. Element is the least reactive in group VII
- 11. Least reactive element
- 12. Horizontal column in the periodic table
- 13. Most reactive element in the periodic table
- 16. Element is found in period VI and has 2 valence electrons
- 18. Mass of 0
- 19. Element is the least reactive in group I