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16 Cards in this Set
- Front
- Back
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had only idea of atoms
from greece philosopher |
Democritus
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Experiments
1st real atomic theory in 1803 did experiments w/ gases talked aobut bonding, each element is different |
John Dalton
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identified ELECTRON
Cathode Ray Tube |
J.J. Thompson
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showed path particles took path, showed how electrons moved
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Cathod Ray Tube
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Ernest Rutherford
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nucleas is in the center
almost eerything else in the atom has empty space |
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Niels Bohr
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Atom spectra
model of atom in which radiation was emmited only when an electron jumped from orbit or shell to another |
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james chadwick
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found neutral charges
NEUTRONS |
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Murray Gell-mann
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quark-sub-subatomic particles
missing particles found out that protons, electrons, and neutrons aren't the smallest part of an atom |
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What is an atom spectra
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when atoms lose energy they give off specific colors of light
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democrius, john dalton, jj thomson, ernest rutherford, niels bohr, james chadwick, murray gell-mann
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YES that is the order
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democritus, james chadwick, jj thomspon, murray gell-man, ernest rutherford, John dalton, niels bohr
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FALST NO NO NO
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What are ions?
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atoms that have a positive or negative charge
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what is an isotopes?
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atoms of the same elent that have different numbers of neutrons (because they have diff. masses)
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what is an electron cloud?
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where electrons are in an atom
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what is the order of the electron levels?
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2,8,18,32
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which is the smallest subatomic particle that is 2000x smaller?
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electrons
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