Across
- 2. Most unreactive group
- 5. All are radioactive
- 7. One synthetic element named after a prize.
- 9. Elements created by men.
- 11. Energy requiered to remove an electron
- 15. When a star dies.
- 16. They react with water to form alkaline solutions.
- 17. These are revealed by the arrangement of the periodic table
- 18. Atomic radius _______ as you move down a group.
Down
- 1. It is in a class by itself
- 3. Original explosion of the universe according to theories.
- 4. Particle accelerator for superheavy elements.
- 6. It decreases as you move down a group.
- 8. Early chemists tried to perfom this nuclear reaction.
- 10. Symbol of one element found in the spectra of stars
- 12. One of the basic 6 elements
- 13. Another name for group 17
- 14. Most elements are __________
- 15. Here we can find nuclear reactions today.
- 19. It is formed when you mix metals.