Across
- 8. steam of mass-less particles
- 9. ions that positively charged
- 15. energy that comes from a source
- 16. single electron in outer shell of an atom
- 19. fast moving electron emitted by radioactive
- 20. atom or group of atoms
- 21. tendency of atoms
- 22. waves that pass a fixed point
Down
- 1. shell or orbital, relative to atoms nucleus
- 2. diagram that represent the valence electron
- 3. tiny particle
- 4. state of a physical system
- 5. ions that negatively charged
- 6. emission of ionizing radiation or particle
- 7. distance between identical points
- 10. frequencies of electromagnetic radiation
- 11. arrangement of electron in orbitals
- 12. sum of mass and atomic number
- 13. electromagnetic radiation of a kind aristing
- 14. energy level defined by quantum theory
- 17. particles consisting of 2 protons and 2 neutrons
- 18. smallest discrete unit of phenomenon