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John Dalton
Hypothesiezed that atoms combine in definite proportions. He proceeded to calculate the atomic weights from the percentage composition of compounds. -
G.J. Stoney
He introduced the concept of an electron in 1874 and recognized it as the amount of electricity produced during the electrolysis of compounds. The word electron came about a few years later in 1891. -
Eugen Goldstein
Studied and Discovered Canal rays. His work and studies also proposed the presence of protons. -
J.J. Thomson
Investigated the rays from cathode rays with magnets, his findings showed that cathode rays were composed of an unknown negatively charge particle(electrons). -
Karl Braun
Invented Cathode ray tube, which aided in the inventention of the T.V. -
Niels Bohr
Proposed the different energy levels of electrons in an atom and that each level orbited the nucleus in a stable and organized manner. -
Hautaro Nagaoka
Nagaoka developed the planetary model of electrons orbiting the nucleus. -
Richard Abegg
Proposed the Rule of 8; normal valence plus contravalence adds up to 8, also known as abeggs rule. -
Marie Curie
Known for her pioneering research of Radioactivity and her discovery of the mystery element of radium. -
R.A. Millikan
His biggest success is the determining the charge of an electron and it's consistancy through all atoms. -
Ernest Rutherford
Suggested the idea of neutron based on his gold foil experiment. Conducted gold foil experiment, which suggested most of the atoms mass is found in a nucleus with the rest of the atom being empty space. -
Frederick Soddy
Known for his observations of the spontaneous decay of elements, calling them isotopes -
H.G.J. Mosely
He wrote that the atomic numberis the number of protons in the nucleus. This helped make a more acurate periodic table. -
Erwin Schrodinger
Related the behavior of matter and behavior of atoms by using quantum mechanics. -
James Chadwick
Discovered the neutron and studied it, which later lead to the discovery and creation of the nuclear bomb during the Manhattan project.
