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Aristotle
Where: Greece
what: All things made of fire, water, and air.
how: studying, teaching and writing.Democritus
where: ancient Greece
what: Discovered the smallest piece of matter
How: just by observing the atom.John Dalton
where: Manchester, United Kingdom
What: first modern atomic theory
how: Made from combing Atoms in simple whole number ratiosJacob Berzelius
where: Sweden
what: measure accurate atomic weights for the element .
How: elecctrostaticRutherford
Where: new Zealand
What: that an atom had a central positive nucleus with negative electrons orbiting it.
How: The gold foil experiment.JJ Tomson
Where: Manchester, England
what: discovery and identification of the electron
how: placed cathode tubes in electric and magnetic fields.Alfred Nobel
where : Sweden
what: invented dynamite
How: Made of nitroglycerin, sorbets and stabilizers.Neil Behr
Where: Denmark
What: theory for the hydrogen atom on the quantum theory
How: electrons orbiting a nucleues at different energy
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