In 1803 Dalton unveiled his concept of Dalton's Law of Particle Pressures. Also first scientist to connect the behavior of atoms to their weight.
Eugen Goldstein discovered cathode rays and anode rays.
J.J. Thomson discovered the electron and also discovered that elements have different isotopes. Won the Nobel Prize in 1906.
In 1900 Max Planck published a paper showing the relationship between the energy and the frequency of radiation, which is now called Planck's constant.
Ernest Rutherford introduced the idea of an element radioactively decaying into a different element. Also introduced a model of an atom. Also discovered the proton. He was awarded the Nobel Prize in 1908 for Chemistry.
In 1905 Albert Einstein published his paper on the Theory of Relativity. For his explanation of the photoelectric effect, Einstein won the Nobel Prize for Physics in 1921.
Robert Millikan successfully determined the charge of electrons. For his work Millikan was awarded the Nobel Prize in 1923.
Henry Moseley used X-Rays to study the atomic structure. His discoveries led to a better organized periodic table.
Neils Bohr concludes that an atom has different energy levels, and that when an atom receives a quanta of energy it jumps a level, and when it radiates a quanta is falls a level.
Louis deBroglie is famous for his work on the wave mechanics of electrons. He was awarded the Nobel Prize in 1929 in Physics.
In 1925, Heisenberg published his theory of quantum mechanics. He is also famous for his principle of uncertainty. For his work on quantum mechanics, Heisenberg was awarded the Nobel Prize for Physics in 1932.
In 1926, Erwin Schrodinger published papers that would provide the foundations for quantum wave mechanics. In 1933 he shared the Nobel Prize with another physicist.
In 1932 James Chadwick discovered the neutron. He published his findings in his paper, "Possible Existence of Neutron." Won Nobel Prize in 1935.
Discovered oxygen, carbon monoxide, and nitrogen dioxide
Law of Conservation of mass; father of modern chemistry
Electrochemical cell and batteries
Electricity and electrochemistry
Dynamite, Nobel Prize
Neoprene and nylon
Nuclear Chain Reactions and atomic bomb
Polymerase Chain Reaction