-
He believed that all matter, time and space was made up of atoms
-
Agreed all matter was made up of atoms but believed that atoms were indestructible and that compound are the combination of two atoms.
-
Created the periodic table and justified that physical and chemical elements had to do with atomic number.
-
He discovered that atoms had positive charges equal to electrons.
-
Discovered radioactivity
-
He discovered the electron and did experiments on it through a high vacuum cathode-ray tube.
-
Used the idea of quanta to explain hot glowing matter.
-
Used gold foil experiment to modern model of an atom. All positive charges were centralized and all electrons were orbiting.
-
Used the oil drop experiment to determine the charge of a single electron
-
Discovered that the outer orbit can hold more electrons than the inner orbit.
-
Came up with isotopes
-
The uncertainty principle means that you can't know the charge and the location of the electrons simultaneously.
-
Discovered neutrons help balance out the protons.