Democritus
Published on Nov 18, 2015
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Democritus
- Used Philosophy, not science
- Atoms were indivisible and indestructible
- Everything is made up of atoms.
Photo by ProLithic 3D
John dalton
- He picture atoms as tiny.
- Atoms are indestructible particles.
- Atoms have no internal structure.
J.j thomson
- A British scientist who discovers a electron.
- He makes a plum pudding model.
- He pictures electrons embedded in a sphere.
- A sphere of positive electrical charge.
Photo by Andrew from Sydney
Ernest rutherford
- A New Zealand physicist
- He finds that an atom has a small, dense, positively charged nucleus.
- Electrons move around the nucleus.
Neils bohr
- Electron moves in a circular orbit.
- Electron is at a fixed distance from the nucleus.
- This happens in the Bohr Model.
Erwin schrodinger
- He develops mathematical equations.
- Equations to describe the motion of electrons in atoms.
- He made the electron cloud model.
james chadwick
- He is a English physicist
- He confirms the existence of neutrons.
- Neutrons have no change.
- Atomic nuclei contain neutrons and positively charged protons.
