Gw+atomic

=__**Atomic Models**__= __i. Ancient Greek__ Leucippus

The word “atom” is derived from the Greek word “atomos”, meaning “that which cannot be divided”.

=__ii. The Plum Pudding model__=

[[image:leewignall/Picture1.png width="256" height="173"]][[image:leewignall/Picture2.jpg width="260" height="273"]]
In 1906, Thomson created a current of negatively charged particles in a cathode-ray tube that were much smaller than an atom.

__iii.Rutherford's model __ In 1908, Ernest Rutherford fired alpha particles (protons) at gold atoms and discovered that the center of the atom is densely packed and positively charged. =__iv. bohr's model__= In 1913, Neils Bohr introduced quantum mechanics into the atomic model.

__ ﻿v. schrodinger's model. __

In 1926, Erwin Schrodinger introduced probabilty into the structure of the atom