Other Scientists that made significant contributions
Antoine Lavoisier- law of conservation of mass; father of modern chemistry 1772
Joseph Priestley- discovered oxygen, carbon monoxide, and nitrogen dioxide 1774
Alessandro Volta- electrochemical cell and batteries 1800
Michael Faraday- electricity and electro chemistry 1821
Louis Pasteur- pasteurization process 1848
Alfred Nobel- dynamite, Nobel prize 1867
Henri Becquerel- radioactivity 1896
Marie Curie- radioactivity 1898
Guglielmo Marconi- radio 1901
Sir Frederick Banting- isolated insulin 1921
Philo Farnsworth- TV 1934
Wallace Carothers- neoprene and nylon 1935
Leo Szilard- nuclear chain reactions and atomic bomb 1942
Kary Mullis- polymerase chain reaction 1983
Scientists that contributed to modern atomic theory
John Dalton 1803
Dalton came up with the atomic theory which states that all matter was composed of small indivisible atoms, atoms of a given element possess unique characteristics and weight, and there are three different types of atoms.
Eugen Goldstein 1886
Goldstein is known as the discoverer of protons. He also did experiments with cathode ray tubes.
J.J. Thompson 1897
Thomson discovered the electron in 1897. He also concluded that electrons had a mass that was 1000 times smaller than a hydrogen atom.
Ernest Rutherford 1898-1910
1898 - 1910
In 1898 Rutherford discovered alpha and beta rays in uranium radiation. in 1910 he came up with the concept of the nucleus.
Max Planck 1900
Planck is the originator of the quantum theory, which helps with understanding the atomic and subatomic processes.
Robert Millikan 1909
Millikan was an american physicist who determined the charge on an electrons using charged oil drop experiments.
Neils Bohr 1913
Bohr came up with the theory that electrons only travel in certain successively larger orbits. He also determined that the outer rings hold more electrons than the inner rings. He also determined that when an electron jumps from an outer orbit to an inner one, they emit light.
Henry Moseley 1913
Moseley determined the number of positive charges in the nucleus by measuring the wavelength of the x-rays given off by certain metals.
Albert Einstein 1916
Einstein came up the the general theory of of relativity and the photon theory of light and the theory of gravitation He also contributed to the theory of radiation and statistical mechanics.
Louis de Broglie 1924
De Broglie introduced the theory of particle-wave duality.
Erwin Schrodinger 1926
Schrodinger invented wave mechanics, which are used in quantum physics.
Werner Heisenberg 1927
Heisenberg came up with the uncertainty principles and developed the operator methods for the solution of quantum mechanical problems.
James Chadwick 1932
James Chadwick proved the existence of neutrons and contributed to the successful controlled fissioning of Uranium-235. He also eventually contributed to the development of the atomic bomb.