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Unit 2: Historical Development of the Atom (Part 1B)
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Terms in this set (17)
Thomson
cathode ray tube experiment
Thomson's model of the atom
plum pudding
Millikan
oil drop experiment
Rutherford
gold foil experiment
Democritus
matter is made of tiny particles, "atomos"
Dalton
Atomic Theory
Dalton's model of the atom
solid sphere
Bohr's model of the atom
planetary model
the model of the atom we use today
Quantum Mechanical Model
mass number
protons + neutrons
atomic number
number of protons
ion
atom with a charge
cation
positively charged atom; lost electrons
anion
negatively charged atom; gained electrons
mass of an electron
0 amu
mass of a proton
1 amu
isotope
same number of protons; different number of neutrons
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