Democritus

1) Born in Abdera, Greece in 460BC and died at the age of 90.

2) His mentor, Leucippus, originally came up with atomic theory that later was adopted by Democritus.

Atomic Theory

All matter consists of invisible particles called atoms.

Democritus' Beliefs

Atoms differ in size, shape, mass, position, and arrangment. They are also indestructible and invisible.

Democritus' Beliefs

Solids are made of small pointy atoms that allow them to hold together and liquids are made of larger round atoms that can slide by eachother.

Democritus' Atom

His model of an atom had no protons, neutrons, or electrons.

The Truth

Atoms are no longer indestructible and they are now visible using advanced microscopes.




The Truth

Atoms really have protons, electrons, neutrons.

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Public - 9/13/16, 5:17 PM