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