-
101
Thales .. 624BC
Thought everything was made of water. -
101
Democritus .. 460BC
All matter is made up of atoms.(first person to think of the atom) -
101
Aristotle .. 384BC
Didn't believe in the Atomic theory, he thought everything is made up of fire, water, ear, and air. -
Sir Issace Newton
Matter is formed of massy empenetrable particals. -
John Dalton
-Atomic Theory
-First peron to have experimental evidence. -
Henri Becquerel
Discoverec radioactivity. -
Thomas
discovery of electrons. -
Thomas
Discovery of electrons . -
earnest rutherford
he discovered the nucleus. -
milikan
found the charge of an electron. -
Niels Bohr
-created the bohr model of the atom.
-thought electron orbited around the nucleus. -
Schrodinger
quantom mechancial model
proved bohr model wrong -
James chadwick
proved theil was electons