Daily Almanac for
Nov 30, 2009
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at•o•mic•i•ty



Pronunciation: (at"u-mis'i-tē), [key]
—n. Chem.
1. the number of atoms in a molecule of a gas.
2. valence.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

atomic hydrogenatomic mass
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