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18 Cards in this Set

  • Front
  • Back
Relative Abundences when added together = ___
1
Average Atomic Mass=
(Relative abundence (decimal form) X mass) + (relative abundence X Mass)
relative abundence
percent expressed as a decimal
__
C
___- mass number
C
__
___- Atomic Number
Isotopes have different # of ____
neutrons
amu
atomic mass units
How do you know if it's a neutral atom?
If there is not positive or negative signs following the element symbol
Mass #
protons + neutrons
# of neutrons
Mass #- protons
Rutherford
Discovered atom nucleus
Dalton
Theorized an atom is indivisable
Thomson
Discoved electons
Mass of neutron
1.0067 amu
mass of electron
-24
9 x 10 amu
mass of proton
1.0073 amu
cathode
negative electrode
anthode
positive electode