Across
- 2. Energy carried by electromagnetic radiation
- 5. proton, neutron, electron
- 6. opposite hydrogen atoms
- 7. positive charged particle
- 8. same mass as corresponding particles
- 9. governs how the particles are affected by an electric or magnetic field
- 11. chemical structure of a substance changes
- 13. violently exploding stars
- 14. protons that move through space at nearly the speed of light
- 18. 1000000 tons of TNT
- 20. Famous scientist.
Down
- 1. tool for viewing objects that cannot be seen with the naked eye
- 3. every particle has an antiparticle
- 4. gamma rays are generated when particles are broken apart
- 10. extremely powerful explosions on the Sun
- 12. European Center for Nuclear Research
- 15. identical to ordinary matter
- 16. electromagnetic radiation with highest energy
- 17. founded in 1995 at CERN
- 19. Positron emission tomography