Atoms Timeline

Aristotle:
How the poser contradicted any front patterns?
-He argued against the theories of Greek philosopher Leucippus of Miletus and his learner Democritus of Abdera in the 5th hundred B.C

Contribution?
-He believed that a piece of matter could be divided up an uncounted number of times. He suggested that everything in this world was made up of some combination of four elements: earth, fire, water, and air. The elements were acted upon by the two forces of gravitational force and levity. His theory held two forces conflict and harmony. Aristotles theory was apply for almost 2000 familys, until after the scientific revolution.
The year/century the model was adopted?
-384 322 B.C.
Henri Becquerel:
How the model contradicted any previous models?
-He compel scientists to change their ideas about atomic structure.
Contribution?
-His discovery of radiation syndrome in uranium forced scientists to change their ideas about atomic structure. Radioactivity demonstrated that the atom was neither indivisible nor immutable.
The year/century the model was adopted?
-1896

Niels Bohr:
How the model contradicted any previous models?
-Bohr made improvements to Ernest Rutherfords model with the implementation of Max Plancks new idea of quanta.
Contribution?




-He proposed that electrons existed at gravel levels of aught at fixed distances from the nucleus. If the atom absorbed energy, the electron jumped to a level further from the nucleus: if it lost energy it fell to a level closer to the nucleus.
They year/century the model was adopted?
-1913

James Chadwick:
Contribution?
-Chadwick proved the introduction of neutrons. For his discovery, he was awarded the Hughes Medal of the Royal Society in 1932, and afterwards the Nobel Prize for Physics in 1935.
The year/century the model was adopted?
-1931

Marie & Pierre curie:
Contribution?
-Pierre Curie and his wife Marie Curie stated that radioactive materials cause atoms to pick up down...If you want to get a full essay, order it on our website: Orderessay



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