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25 Cards in this Set

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Who used the atomic theory to explain the law of definite proportions?
John Dalton
What in the law of definite proportions? And who came up with it?
The ratios of one element to another are always the same in a given chemical compound.
Joseph Proust
Experimented w/ cathode rays discovered electron was the first known particle that is smaller than an atom.
J.J Thomason
(Raisin-pudding model) A sphere of positive charge is embedded with electrons.
J.J Thomason
Stated that substances can emit light only at certain energies or specified amounts of called quantrums.
Max Planck
Presented theory of the atom, consisting of a positively charged nucleus surrounded by negative electrons.
Ernest Rutherford
Who had the Gold Foil Experiment?
Ernest Marsden
Model for the hydrogen atom in which the electron orbits the nucleus and absorbs energy by jumping to a higher orbit.
Neil Bohr
OIL DROP EXPERIMENT , A SEVEN YEAR STUDY
Robert Andrews Millikan
Discovered the proton in 1914
Ernest Rutherford
Proposed the existence of the neutron.
William Draper Harkins
U 235/92 What is the atomic mass? AKA # or neutrons!!!!
235
U 235/92 How many protons?
92
What two parts of Dalton's theory was wrong?
Indivisible/all atoms of an element are the same.
two istopes same ......
protons...neutrons
What is another name for 6.022*10^23
Amedeo Aragadro's #
Same # of protons and different # of neutrons
KNOW ISOTOPE
KNOW DALTONS ATOMIC THEORY
*Indivisible
*cannot be created or destroyed*all matter made of atoms,/same element identical compounds
KNOW JAMES CHADWICK
TWO PARTS OF ATOM CONTRIBUTE TO ATOMIC MASS?
PROTONS AND NEUTRONS
Cathode rays led to discovery of proton
E GOLDSTEIN
Cathode rays led to discovery of proton
E GOLDSTEIN
What is another name for 6.022*10^23
Amedeo Aragadro's #
Same # of protons and different # of neutrons
KNOW ISOTOPE
KNOW DALTONS ATOMIC THEORY
*Indivisible
*cannot be created or destroyed*all matter made of atoms,/same element identical compounds
KNOW JAMES CHADWICK
TWO PARTS OF ATOM CONTRIBUTE TO ATOMIC MASS?
PROTONS AND NEUTRONS