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CHEM 110 1/24/24 duration 48 minutes 33 seconds CHEM 110 1/24/24 CHEM 110 1/24/24	CHEM 110 1/24/24 Light, absorption, emission, how all of the elements were formed starting with the Big Bang elements energy light atoms helium stars wavelengths universe hydrogen frequency protons wavelength radius earth neutrons metals element table iron mass From Katharine Tibbetts 2 plays 0