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370
Democritus death
*Day and month dates for Democritus are not exact. -
440
Early thinking
Democritus thought atoms were indivisble and infinite in size and were completely solid. He also thought atoms were the reasonig behind our senses. -
460
Democritus is born in Abdera
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John Dalton is born
John Dalton was born in Eaglesfield. He was born into a famliy of Quakers. -
Career Interest
Dalton was interested in studying medicine or law but sadly, his famliy did not encourage him. *Day and month are not exact -
Moving Ahead
Dalton moved to Manchester and became a teacher in mathematics and natural philosophy at the "New College" *Day and Month are not exact -
Financial Issues
Due to financial issues the college was having, Dalton became a private tutor in mathematics and natural philosophy. -
John Dalton and the Atomic Theory
Dalton wrote essays titled "Expeirmental Essays". These essays were about mixed gases, pressure of steam and vapors in different temperatures. -
Atomic Weight
He was unsure of how he came up with his first atomic weights but later it was found that he used water, amonia and carbon dioxide to determine the atomic weight. -
First stroke
*Day and month are not correct -
Second Stroke
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Third Stroke
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Daton Dies
Was found dead on the floor by his attendant. -
J.J Thomson is born
He was British -
Max Planck is born
He was born in Germany. -
Robert Andrew Millikan is born
Robert was born in Morrison, Illinois. -
Ernest Rutherford is born
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Albert Einstein is born
Born in Germany -
Niel Bohr was born
Copenhagen, Denmark -
Love is in the air
J.J marries Rose Paget. -
Further Education
Robert recieved his Bachelors degree. He recieved this degree in the classics from the Oberlin College. *Day and month are not correct -
Discovered the Electron
*Day and Month are not correct -
Starting off
J.J learned about protrons and electrons. He learned that atoms aren't indivisble. *Day and month are not correct -
New discovery
Ernest discovers 'rays" from radioactive materials. -
More discoveries
Ernest discovers Radon. -
Heat
Max studied the light emitted by heated objects. This study led him to discover that matter can gain or lose energy only in small specific amounts. This was called Quanta. *Day and Month -
Theory of Relativity
Einstein made the mass-energy equivalence formula. He dealt with problems of statistical mechanics and quantum theory that led to his explainations of particle theory and the motion of molecules. -
Hard work payes off
J.J was awarded the Nobel Prize for discoverying the electron. *Day and month are not correct -
Oil drop expeirment
With the help of Harvey Fletcher, Robert did the Oil drop expeirment that measured the charge of an elecron. -
Experiments lead to success
Ernest discovers the nucleus. He did the gold foil expeirment. -
Bohr Model
Niels developed the Bohr modelof the atom with the atomic nucleus at the center adn electrons around it. He compared this to the planets orbiting around the Sun. *Day and Month are not correct -
Torn apart
Ernest spilt the atoms of Nitrogen and was left with oxygen. *Day and Month are not correct -
J.J discovers Protrons
*Day and month are not correct -
Solar Eclipse
A solar eclpise proves the Theory of Relativity which makes Einsein a worldwide celebrity. -
Nobel Prize
Bohr wins a Noble Prize for physics; investigation of the structure of atoms and radiation coming from them. -
Quantom Theory
Bohr debates the Quantom theory with Albert Einstein. -
Coming to the U.S
Einstein lived in Germany but came to visit in the U.S. He did not return because Hitler was in power. *Day and month are not correct -
Ernest Rutherford Dies
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J.J Thomson Dies
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Max Planck Dies
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Robert Andrews Millikan dies
Robert died of a heart attack in his Califprnia home. He was entered in the "Court of Honor" in the Forest Lawn Memorial Cementery in Glendale, California. -
Albert Einstein dies
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Niels Bohr Dies
