Across
- 2. Center of an atom
- 3. Basic unit of matter
- 7. A cluster of 2 protons and 2 neutrons emitted from a nucleus in one type of radioactivity
- 12. The emission of a continuous range of frequencies of electromagnetic radiation
- 14. A neutrally charged particle
- 15. If waves can behave like particles, particles can behave like waves.
- 17. A value indicating the distance that an electron may move away from the nucleus
- 18. A spectrum showing only certain wavelengths.
Down
- 1. It is impossible to know both the velocity and the position of a particle at the same time
- 4. A region of space around the nucleus where an electron is likely to be found.
- 5. Only available in specific amounts
- 6. The lowest energy state of an atom
- 8. A positively charged particle
- 9. composition Chemical compounds are composed of a fixed ratio of elements
- 10. A particle of light energy
- 11. Streams of electrons given off by the cathode of a vacuum tube.
- 13. Number of protons
- 16. A negatively charged particle