ChemistryMs. Pollock2013 - 20145.2 Atoms and Electromagnetic
Spectra
IntroductionTungsten filament in electric light bulb emits light
when heatedPossible for any metal tungsten chosen because emits
every frequency and appears whiteEvery element emits light when
energized by heating or passing electric current through it
Atoms and Electromagnetic Spectra
Each Element Has a Unique SpectrumAnders J. Angstrom and Johann
J. Balmer passed light from energized atoms through prisms allowed
individual frequencies to be seenEmission spectrum pattern of
frequencies obtained when element subjected to excitation
Each Element Has a Unique Spectrum
Unique spectrum for every atomCan be used to identify
elementsUsed to identify elements present in distant stars
