Atomic Theory Timeline
Category: Other
Updated: 14 Oct 2018
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Created bykendell faircloth
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Events
Democritus discovers the concept of an atom and the atomic theory.Erwin Schrodinger develops wave equation.Erwin Schrodinger figures out where electrons are positioned.Werner Heisenberg creates on Quantum Mechanics documentAntoine Lavoisier started experiments to prove the combustion theory.Antoine Lavoisier implies the law of conservation.Wolfgang Pauli creates the Pauli Exclusion Principle
(electrons cannot be in the same place at the same time).Amedeo Avogadro creates Avagadro's Law (v/m =K)
and Avagadro's Constant.Niels Bohr creates the Bohr model.Robert Milikan conducts the oil drop experiment
(charge of electron).Marie Curie discovers polonium and radium
and also creates the term "radioactivity".Paul Dirac creates the equation to calculate atomic
properties and the wave equation. He also discovered
that protons have the same amount of electrons
when an atom is neutral.Joseph Luis Gay-Lussac creates Gay-Lussac Law
and discovers boron.Max Planck creates the quantum theory
matter can gain/loose energy in certain amounts).J.J. Thomson creates the Plum-pudding model.
He also discovers that electrons existed and
atoms have a charge.Dmitri Mendeleev created the periodic table
and discovered gallium, scandium,
germanium, rhenium, technetium.James Chadwick discovered neutrons.John Dalton discovered atoms are different
elements combined in simple whole numbers
to form compounds and created Dalton's
atomic theory.Ernest Rutherford conducted the gold foil
experiment, in which he discovered
every atom has a nucleus where it
stores all of its positive charge and mass.
He also revised atom model and theory,
as well as he was the first to split an atom.Eugen Goldstein discovered protons and canal rays.Robert Boyle created Boyle's law.
(P1V1=P2V2)
p= pressure
v= volumeSir Williams Crookes studied the effects of
sending an electric current through a glass
sealed tube.Henry Mosely discovered mathematical patterns
between x-rays spectrums of elements and
atomic numbersHans Geiger determined the atom has a
massive, charged nucleus and performed
the Geiger-Marsden gold foil experimentPeriods
Aristotle performs experiments to prove that empty space cannot exist.Louis de Broglie creates the electron wave theory.
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