The discovery of atomic structure: famous scientist's
John Dalton
1803, proposed the atomic theory of matter
Benjamin Franklin
Concluded there are two kinds of eletrical charge, which he called positive(+) and negative(-)
Quantum theory
Describes mathematically the wave properties of electrons
Robert Millikan
Determined the charge of a single electron
Erwin Schrodinger
Developed an equation that treated electrons in atoms as waves
Werner Heisenberg
Developed the heisenberg uncertainty principle. States that it is impossible to determine simultaneously both the position and velocity of an electron or any other particle
Joseph Priestley
Discovered oxygen
Henri Becquerel
Discovered radioactivity
James Chadwick
Discovered the existence of nuetrons
Ernest Rutherford
Gold foil experiment. Calculated that the atom must have a very tiny, positively charged, dense center he called the nucleus.
J.J. thomson
He concluded that the atom was composed of negativly charged particles . named the particles electrons
Ablert Einstein
Introduced the radical idea that electromagnetic radiation has a dual wave- particle nature . called photons
Henry Mosely
Named the individual positive charged proton. Established that the atomic number of the atom defines the identity of the element
Neils Bohr
Proposed a model.. Electrons travel around the nucleus in orbits
Joseph Proust
Proposed law of definite proportions
Democritus
Proposed that all matter is made up of tiny, invisible particles called atoms
Antoine Lavoisier
Proposed the law of conservation of mass
Max Planck
Proposed the relationship between a quantum of energy and the frequency of radiation
Louis de Broglie
Suggested that electrons be considered waves confined to the space around an atomic nucleus. Exist only at specific frequencies
Michael Faraday
Suggested that the structure of atoms is related to electricity