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Democritus
Democritus found that all atoms are invisable -
Isaac Newton
Newton formulated a theory of light, the three laws of motion and suggested a mechanical universe with small, solid masses in motion. -
John Dalton
Said that atoms can't be created or destroyed -
Wilhelm Roentgen
While using a CRT, Wilhelm Roentgen saw nearby chemicals that glowed. Some of the rays weren't deflected by the magnetic field. Which let him discover X-Rays -
J. Plucker
J. Plucker made something used for X-Rays called the Cathode Ray tube -
JJ Thomson
He said that atoms are a ball of postive charge containing a number of electron, discovered the electron. -
Aston
Discovered the existence of isotopes through the use of a mass spectrograph (an instrument for dispersing radiation). -
Neils Bohr
Fundamental contributions to the understanding of atomic strucutre and quantum mechanics. -
Ernest Rutherford
He developed the "gold foil experiment." Rutherford deteremined that the nucleus of an atom is very dense and has a positive charge. -
Erwin Schrodinger
He proposed the "Electron Cloud Theroy." Schrodinger identified the electron cloud as the propable location of moving particles. -
James Chadwick
Chadwick proved the existance of neutron. He discoverd a particle within the nucleus that has a mass similar to that of a proton. -
John Douglas Cockcroft/ Ernest Thomas Sinton Walton
made something which later lead to the atomic bomb which ended World War 2. -
Ernest Lawrence
Ernest Lawrence found that when radioactive isotopes are introduced to the body, they give off an energy or radiation that can be tracked by imaging equipment. -
Enrico Fermi
He conducted the first chain reaction releasing energy from the atoms nucleus. -
First Atomic Bomb dropped
The atomic bomb was dropped to finish World War 2. America used Cockroft and Walton's idea, and split the atom to create a nucleur bomb.