Across
- 5. This force is strong and short ranged.
- 6. What is radioactive debris (extra neutrons) called?
- 7. Different forms of elements that have different amounts of neutrons are _____.
- 8. What radioactive element was used to show that continental drift is real?
- 9. What is a beta particle?
- 10. A form of hydrogen that has two neutrons.
- 12. Each radioactive isotope has a different _____.
- 15. Large atoms release energy in _____ reactions.
- 16. What is the decay product of He-5?
- 17. What is the half-life of a neutron?
- 18. My teacher calls himself _____.
Down
- 1. What is the half-life of Beryllium-7?
- 2. Protons and neutrons are _____.
- 3. If you had a rock that was 1/8 U-235 and 7/8 Pb, then the age of the rock would be _____.
- 4. A form of hydrogen that has one neutron.
- 8. What unit is used to measure radiation?
- 11. What radioactive element would you look for in a fossil?
- 13. How many nucleons can there be in a nucleus?
- 14. How many protons can share an energy level?
- 15. Small atoms release energy is _____ reactions.