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16 Cards in this Set

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