-
Jan 1, 1000
Democritus
(460-370) Proposed the idea that matter was not infinitely divisible. -
Jan 1, 1000
Aristotle
(384-322) Believed that atoms moved through empty space. -
Antoine Lavoisier
Known as the father of modern chemsitry. Founded oxygen and hydrogen. (1778, 1783) -
Eli Whitney
He invented the cotton gin. -
Joseph Proust
Disproved Bertholett with the law of definite proportions. -
John Dalton
(1766-1844) Believed atoms can't be created, divided, or destroyed. -
Robert Fulton
He invented the steamboat. -
Amedeo Avogadro
Known for his contributions to the molecular theory, including what is known as Avogadro's law. -
War of 1812
The war between the Americans and the British. -
Abraham Lincoln
He becomes president. -
The Red River War
-
Panama Canal
Construction begins. -
William Crooks
(1861-1895) Discovered helium and thallium. -
Ellis Island
Becomes the new immigration process center. -
Henri Becquerel
Discovered radioactivity. -
Marie Curie
Famous for her pioneering research on radioactivity. -
Albert Einstein
Famous for his special theory of relativity of E = mc^2. -
Robert Millikan
(1908-1910) Noticed the charge of the electron. -
NACCP
Is founded. -
J.J Thompson
(1897-1912) Discovered the electrons and the isotopes. -
Titanic
Titanic sinks. -
Max Planck
Founder of the quantum theory. -
Radio
The first radio begins in the US. -
Niels Bohr
Made fundamental contributions understanding atomic structure and quantum mechanics. -
Henry Moseley
Had the concept of the atomic number. -
Werner Heisenberg
Known for asserting the uncertainty principle of the quantum theory. He also made important contributions to nuclear physics, quantum field theory, and particle physics. -
Louis DeBroglie
Had the theory of electron waves. -
James Chadwick
Discovered the neutron. -
Ernest Rutherford
Father of nuclear physics, noticed that atoms have their positive charge concentrated in a very small nucleus. -
Erwin Schrodinger
One of the father of quantum mechanics. Created the Schrodinger equation.