-
This greek philosopher first suggested that all substances of tiny indestructible particles called atoms.
-
-
HIs theory composed of:
-All matter consisted of atoms
-Atoms can not be divided
-Atoms of the same element were alike
-Atoms combined into simple whole number ratios -
He discovered that electrons had a negative charge
-
He proposed that the atom consisted of mostly empty space with a dense nucleus conatining positively charged protons
-
He suggested that electrons orbited the nucleus at different energy levels
-
He dicovered that the nucleus contained particles called neutrons as well as protons
