Across
- 1. positivly charged ion
- 6. decay process of gamma rays
- 7. below the atomic number and how heavy an element is
- 10. a big particle and cannot penetrate skin
- 11. one atom splits into smaller particles
- 12. how long it takes for half of something to decay
- 14. a nuetral charged particle
Down
- 2. atoms 83 and higer are this
- 3. two atoms collide and become helium and an extra atom
- 4. the center of an atom
- 5. ping pong balls and mouse traps
- 8. also the amount of protons
- 9. a small single electron and can penetrate skin but is stopped by aluminum
- 13. atom with a different amount of protons