Democritus atomic theory

Democritus atomic theory

1. Reasons to accept it

   • Western scientists accepted in broad outline from the 1600s until about 1900 originated with Greek philosophers in the 5th century B.C.

2. Year of Creation

   • 400 B.C
   • In Acient Greece

3. Statements or assumptions

   • Werner Heisenberg's statement
     • Finally Weber Heisenberg proved that it is actually impossible to prove the exact location and speed of the electron
   • Aristotle's statement
     • But Aristotles disagreed and stated that the matter was made of 4 elements earth, wind, waters, fire; and then most later scientists followed too.
   • Niel Bohr's statement
     • Then Niels Bohr stated that electrons orbit the nucleus at fixed energies and distances. However, this was not true since later discoveries showed that electrons move in a wave like form.
   • John dalton's statement
     • he concluded that the various compounds were combinations of atoms from different elements that neither could be created or be destroyed.
   • Rutherford's statement
     • After the discovery of the electron, Rutherford concluded that atoms consisted largely of empty space with just a few electrons, while most of the mass was concentrated in the center which was termed, the nucleus.

4. Failtures of the theory

   • The error of Democritus
     • thought that atoms were the smallest units of matter - minus little hard spheres that cannot be divided into more fundamental particles. This assumption persisted until experiments in physics realization that the atom was composed of even smaller particles