Across
- 2. an electromagnetic wave that reflects off surfaces, allowing the human eye to see
- 5. a particle of light
- 6. the discontinuous line spectra of light produced when excited atom return to their grounds take and emit photons of a certain frequency
- 10. the minimum quantity of energy that can be lost or gained by an atom
- 11. a region in space within an atom and around the nucleus where the probability of finding an electron is relatively high
- 13. a travelling disturbance that travels through space and matter
- 14. any state of an atom that is higher than the ground state
- 17. the emission of electrons from a metallic surface when the electromagnetic radiation of a high energy frequency is incident on it
- 20. the ability to do work or cause change
Down
- 1. the range of electromagnetic radiation organized
- 3. the lowest possible energy state of an atom
- 4. the proportionality constant relating a photon's energy to its frequency
- 7. a form of electromagnetic energy
- 8. the portion of the electromagnetic spectrum that is visible to the human eye
- 9. electromagnetic waves with the longest wave length and lowest frequencys
- 12. the distance (from crest to crest) in the line of a wave from any point to the next
- 15. the energy levels contained within a principal energy levels
- 16. the maximum distance that the particles of a wave's medium vibrate from their rest position
- 18. a negatively charged particle that can be bound to an atom
- 19. the number of waves produced in a given amount of time