http://www.ck12.org Chapter 23. The Atom
24.4 References
- CK-12 Foundation - Christopher Auyeung and Samantha Bacic, using helium emission spectrum by User:Jkasd/Wikimedia
Commons. Helium emission spectrum: http://commons.wikimedia.org/wiki/File:Helium_Emission_Spectru
m.svg. - Christopher Auyeung and Samantha Bacic. CK-12 Foundation.
- CK-12 Foundation - Christopher Auyeung, using emission spectra by User:Merikanto/Wikimedia Commons
and User:Adrignola/Wikimedia Commons (H). http://commons.wikimedia.org/wiki/File:Emission_spectrum
-H.svg. - Courtesy of the Nobel Foundation. http://commons.wikimedia.org/wiki/File:Schrodinger.jpg. Public Domain
- Christopher Auyeung. CK-12 Foundation.
- Christopher Auyeung. CK-12 Foundation.
- Christopher Auyeung. CK-12 Foundation.
- Richard Parsons. CK-12 Foundation.
- Courtesy of the US Air Force. http://commons.wikimedia.org/wiki/File:Military_laser_experiment.jpg. Pub-
lic Domain