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