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Period: 300 to
atomic structure
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460
democritus
Democritus created an atomic theory stating that atoms are miniscule quantities of matter. -
antoine lavoisier
He created the combustion theory. This was based on sound mass measurements. -
joseph proust
he proposed the law of constant compotition. This law was radical. -
John Dalton
Dalton proposed the law of multible porportions. This led to the atomic theory. -
Michael Faraday
He discovered electromagnetic induction, diamagnetism and electrolytes. -
Marie and Pierre Curiw
Together they discovered a new type of radiation which was called the x-ray. -
J.J. thomson
In 1897 he descovered the electron In a series of expiriments. These were meant to study electric discharge. -
Henri Becquerel
He discovered radioactivity and won the nobel prize in physics. -
robert millikan
Decide the unit charge of electron. -
ernest rutherford
He proposed the nuclear atom and the existence of the third atomic partical, the nuetron. -
Niel Bohr
He proposed a theory for the hydrogen atom based on quantum theory that energy is tranferred only in certain well defined quantities. -
Albert Einstein
He developed the theory of relativity. -
Max Planck
He originated the quantum theory. -
Louis DeBroglie
He suggested that all matter has wave properties and won a nobel prize for his efforts. -
Erwin Schrodinger
He discovered new productive forms of atomic theory. He created a wave equation that accurately gave the energy levels of atoms. -
James Chadwick
He discovered the neutron and later won a nobel prize. -
Otto Hahn
Discovery of the fission of heavy nuclei. -
Lise Meitner
On the team that discovered nuclear fission and colleague of Otto Hahn. -
Glenn T. Seaborg
His discovery and investigation in transuranium elements earned him a nobel prize in chemistry. -
aristole
He believed that everything on earth was made from four elements.
