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Sep 24, 1111
democritus
philosopher who formulated an atomic theory for the universe. 400 B.C. -
John dalton
he was responseable for the development of modern atomic theory..made the solid sphere modle -
Robert millikan
honored with the Nobel Prize for Physics in 1923 for his measurement of the elementary electronic charge and for his work on the photoelectric effect. -
ernest rutherford
In early work he discovered the concept of radioactive half-life, proved that radioactivity involved the transmutation of one chemical element to another -
Erwin Schrödinger
Erwin Schrödinger formulated in 1926 a wave-equation that accurately gave the energy levels of atoms. -
neils bohr
developed the Bohr model of the atom with the atomic nucleus at the centre and electrons in orbit around it, which he compared to the planets orbiting the Sun
bohr made the planetart modle -
Louis de broglie
he postulated the wave nature of electrons and suggested that all matter has wave properties. This concept is known as wave-particle duality or the de Broglie hypothesis. -
j.j. thomson
credited with the discovery and identification of the electron. Thomson is also credited with finding the first evidence for isotopes -
Werner heisenberg
discovered the particle now known as the meson -
albert einstein
best known for his mass–energy equivalence formula E = mc2 made the nuke modle -
wolfgang pauli
Pauli introduced two new quantum numbers and formulated the so called Pauli principle -
james chawick
Discovery of the neutron
Manhattan Project -
The atomic theory
atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms
