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Everything is made of particles.
Atoms are physically, not geometrically invisble.
Between atoms lie empty space.
Atoms are indestructible, have been and always will be in motion.
Used analoges of his senses.
Looks like the substance it caomes from. -
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All matter is made of atoms.
Atoms are indivisble, and indestructible.
All elements of given elements are identical in mass and properties.
Compounds are formed by a combination of two or more different kind of atom.
A chemical reaction is a rearrangement of atoms.
Used a chemical reaction
Looked like a atom and two molecules. -
He added and changed electrons.
Used the Plum Pudding Model and the High Vaccum Cathoderay
It looked like a sphere of positive matter; in which electrons are positioned by electrstatic forces. -
Atom consist of nucleus.
Contains whole positive charge and whole atom mass.
Electron rotate on orbits.
Used the Gold Foil Experiment
Looked liked a planetary.
Nuclues in middle.
Electronms circling. -
Electrons move in orbits of fixed size and energy.
Electron energy depend on size of the orbit and lower for smaller orbits.
Used a mathemartical model.
Quantums Physics
Plannacks Constant
Present Models
Bohr Model -
You can not measure the position and momentum of particle simultsneously.
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Didn't believe in atomic theory.
Believed in four elements.
Matter made up of pieces of four elements.
Used Obsevation
