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Scientist Timeline

Enrico Fermi

Date: 1901

Created worlds first nuclear reactor, The Chicago Pile-1. Also known as "architect of the nuclear age" and "architect of nuclear bomb"

ALbert Eistein

Paul Dirac

Date: 1879

Became famous for the theory of relativity, that laid the basis for the release of atomic theory.

Wilhelm Roentgen

Isaac Newton

John Dalton

Date: 1902

Introduced the idea of polarization and developed the field of of quantum electrodynamics.

Democritus

Date: 1704

understood that atoms or particles move, and are not just stationary.

Date: 1845

He found very penetrating rays coming from CRT that were not deflected by a megnetic field and he named them X-RAYS.

date: 1803

Proposed that all matter is composed of atoms.

Date: Greek Era

Said everything is made up of atoms.

Dmitri Mendeleev

MAX pLANCK

Robert Millikan

Date: 1858

Used the idea of quanta (discrete units of energy) to help explain hot glowing matter

e. Goldstein

Williams Crookes

Date: 1850

Used a CRT (Cathode Ray Tube) to study canal rays that had electrical and magnetic properties.

Pierre & Marie Curie

Date: 1834

He formulated the periodic table.

James Chadwick

Date: 1832

Studied the effects of sending an electric current through a gas in a closed tube.

Henri Becquerel

DAte: 1859

Worked together in the study of radioactivity which eventually led to theri discovery of the elements of radium and polonium.

Date: 1891

Bombarded beryllium atoms with alpha particles. He interpreted this radiation as being composed of particles with a neutral electrical charge and the approximate mass of a proton.

Date: 1852

Discovered radioactivity

Aristotle

George Johnstone

Date: 1826

Made discover that an atom has electrons

Date: 1968

Did an oil drop experiment that helped quantify the charge of an electron

Date: 384 BC

He did not think all things were made of atoms, but that there were 4 elements.

Fire, WAter, EArth, Air.

Michael Faraday

J.J Thomson

Date: 1832

Made a discovery that atoms had an electrical component

Date: 1856

Discovered the electron by experimenting with a Cathode Ray. Demonstrated cathode rays were negatively charged.

James Clerk MAxwell

Date: 1831

Proposed electric and magnetic fields

ERnest Rutherford

Neils Bohr

Date: 1871

Designed an experiment to use the alpha particles of emitted by a radioactive element as probes to the unseen world of atomic structure.

Date: 1885

Proposed theory for hydrogen atom based on quantum theory that energy is transferred in only certain quantities.

Schrodinger

Date: 1930

Viewed electrons as continuous clouds and introduced "wave mechanics" as a mathematical model of the atom

Henry Moseley

Glenn Seaborg

Date: 1887

His studies resulted in a more accurate positioning of elements on the periodic table.

Date: 1912

Shared nobel prize for his discovery of the transuraniam elements.

By: Allie Totten

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