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9 Cards in this Set

  • Front
  • Back
the smallest particle of an element that retains all the properties of that element
atomic mass (atomic weight)
the weighted average atomic mass of the atoms in a naturally occuring sample of an element
atomic mass (of an individual atom)
mass of an atom relative to the mass of a Carnon-12 atom
atomic mass unit
(amu) 1/12 the mass of a Carbon-12 atom
atomic number
(Z) number of protons in the nucleus of an atom
chemical symbol
a shorthand representation for an element
-atoms that have the same number of protons, but different number of neutrons

-atoms of the same element that have different atomic mass or mass numbers
mass spectrometer
a device that separates atoms (ions) by mass
tiny, dense, positive nucleus, surrounded by a charged volume of empty spacethat contains the electrons