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7 Cards in this Set

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PROTONS
THE POSITIVEIY CHARGED PARTICLES OF THE NUCLES; THE NUMBER OF PROTONS IN A NUCLEUS IS THE ATOMIC NUMBERS, WHICH DETERMINES THE IDENTITY OF AN ELEMENT.
ATOMIC MASS UNIT
THE SI UNIT USED TO EXPRESS THE MASSES OF PARTICLES IN A ATOMS.
NEUTRONS
THE PARTICLES OF THE NUCLEUS THAT HAVE NO CHANGE.
ATOMIC NUMBER
THE NUMBER OF PROTONS IN THE NUCLEUS OF AN ATOM; THE ATOMIC NUMBER IS THE SAME FOR ALL ATOMS OF AN ELEMENT.
ISOTOPES
ATOMS THAT HAVE THE SAME OF PROTONS BUT HAVE DIFFERENT NUMBERS OF NEUTRONS.
MASS NUMBERS
THE SUM OF THE PROTONS AND NETRONS IN AN ATOM.
ATOMIC MASS
THE WEIGHT AVERAGE OF THE MASSES OF ALL THE NATURALLY OCCURRING ISOTOPES OF AN ELEMENT.