Across
- 2. radiation that can be stopped by our skin
- 4. has a neutral charge
- 6. radiation that needs to be stopped with 10ft of concrete
- 7. atoms with the same element with different amounts of neutrons
- 9. splitting of Uranium-235
- 10. Can only be found mathematically
- 12. A specific amount of time will go by and only half the material will be decayed
Down
- 1. can make other atoms into ions
- 3. radiation that can be stopped by tin foil
- 5. opposite of a negative charge
- 8. The number can be used to find an element on the periodic table
- 9. hydrogen nuclei fuse in a stars to form the element helium
- 11. particle that is throwing off of an isotope