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