3-1: The Atom: Development of Models
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Democritus
Eventually, a piece of matter could not be cut in half anymore
Atomos
“uncuttable” –> atom
Who made the hard sphere model?
Dalton
Dalton and his Atomic Theory
All matter is made of invisible atoms. Atoms are arranged in different combinations to make compounds. Atoms cannot be created nor destroyed. Atoms of the same element are all identical.
What part of the atom did J. J. Thomson discover?
Electrons
Who made the plum pudding model?
J. J. Thomson
What experiment did J. J. Thomson do?
Cathode ray tube
Who made the nuclear model?
Ernest Rutherford
What experiment did Ernest Rutherford do?
Golf Foil Experiment
What did Ernest Rutherford discover?
Nucleus, Proton
Who made the planetary model/electron shell model?
Niels Bohr
What did Niels Bohr discover?
Orbiting electrons
Who made the quantum mechanical model/wave mechanical model?
Erwin Schrodinger
What did Erwin Schrodinger discover?
Electron Cloud, Orbital
Name all scientists in order.
Dalton, Thomson, Rutherford, Bohr, Schrodinger
Name all models in order.
Hard sphere, Plum Pudding, Nuclear, Planetary, Wave mechanical model
Name all features discovered in order.
Electron , proton & nucleus, electron shells, orbitals