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Democritus
Democritus called the particles pf matter atoms. Picture credited to: Google,com -
John Dalton
John Dalton said matter is made of spherical solid masses in motion. picture credited to: Google.com -
Wilhelm Roentgen
Wilhelm Roentgen invented the x-ray in 1895 -
J.J. Thompson
J.J. Thompson descibed the atom as a ball of positive charge containing a number of electrons. -
Ernest Rutherford
Ernest Rutherford used his "gold foil" experiment to determine that the nuecleus of an atom is dense and had a positive charge. Thus, discovering the proton . He assumed that the electrons were outside the nucleus of an atom. Picture creditied to: Google.com -
X-Rays
The first x-ray was used for medical purposes. -
Niels Bohr
Niels Bohr explained the atomic structure of the atom as "sucessful orbital shells of electrons".His model is known as the Bohr planetary model. picture creditied to: Google.com -
Niels Bohr (agian)
Neils Bohr won a nobel prize for his work with the atomic theory. -
de Broglie and Schrodinger
de Broglie and Schrodinger identified the electron cloud as the probable location of moving electrons. picture credited to: Google.com -
James Chadwick
James Chadwick discovered a particle with the nucleus that has a mass similar to that of a proton. He is credited with discovering the neutorn. picture credited to: Google.com -
Atomic Bomb
The first atomic bomb waas dropped to end ww II
