Across
- 4. Outermost electrons that determine chemical reactivity
- 5. Lowest downward point or valley of a wave
- 8. Number of wave cycles passing a fixed point per second
- 10. Classic acronym identifying the visible spectrum colors
- 11. Atoms of one element with different neutron numbers
- 14. Danish physicist who modeled electrons in circular orbits
- 16. Negatively charged ion formed by gaining electrons
- 18. Emission of electrons from metal struck by light
- 22. Three-dimensional region where finding an electron is probable
- 24. Minimum discrete packet of energy an atom can absorb
- 25. High energy state reached after absorbing a photon
Down
- 1. Prism device used to view atomic emission lines
- 2. Positively charged ion formed by losing electrons
- 3. Positive subatomic particle inside the nucleus
- 6. Lowest possible energy state for an atomic electron
- 7. Clockwise or counterclockwise magnetic property of electrons
- 9. Neutral subatomic particle located in the nucleus
- 12. Dumbbell-shaped sublevel containing three spatial orientations
- 13. Discrete packet or particle of electromagnetic radiation
- 15. Distance measured between two consecutive wave crests
- 17. Dense central core containing an atom's mass
- 19. Negative subatomic particle discovered by Thomson
- 20. Hydrogen spectral transition series emitting visible light
- 21. Spherical sublevel found in every principal energy shell
- 23. Highest point or peak of an electromagnetic wave