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knowledge of the atom

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What is the difference between an atom and an ion? Provide an example.

Describe two ways an atom can be excited.

Why should photons emitted by a hotter material have an average shorter wavelength?

Atoms produce spectra. Distinguish between a continuous, a bright-line, and an absorption spectrum by describing hw each is formed.

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Check out the following sites:
http://en.wikipedia.org/wiki/Emission_spectrum
http://en.wikipedia.org/wiki/Ion
http://en.wikipedia.org/wiki/Atom

http://en.wikipedia.org/wiki/Wien%27s_Law
http://en.wikipedia.org/wiki/Blackbody_radiation

1.
An atom is an electrically neutral particle. It has a nucleus composed of heavy positively charged protons and neutral neutrons. Around the nucleus orbit negatively charged electrons. Since the atom is electrically neutral the number of protons equal the number of electrons.

An ion is an atom that some electrons has either been added or removed, hence providing the particle a net ...

Solution Summary

Facts about the atom are expressed. Why photons emitted by a hotter material have an average shorter wavelength is determined.

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