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