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Often noted as the bloodiest war in U.S. History, the war began with a Confederate attack on Ft. Sumter.
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Often noted as the bloodiest war in U.S. History, the war began with a Confederate attack on Ft. Sumter and ended with a formal surrender at Appomatox Courthouse.
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The Gettysburg address was made by Abraham Lincoln to honor the fallen souls during the civil war.
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J.A.R. Newlands made a theory that, if placed in order of atomic weight, elements have similarities in groups of 7.
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On this day, John Wilkes Booth killed Abraham Lincoln in a theater.
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17th President Andrew Johnson was tried for many crimes and misdemeanors, getting impeached on this day.
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In this year, Dmitri Mendeleev made a table that aranged elements in order of atomic mass. The elements were divided by similarities, in a "Periodic" way.
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Using the Cathode Ray Experiment, Eugen Goldstein discovered positive-charged parts in an atom, which are known today as "protons."
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J.J. Thomson used the Cathode Ray experiment to study atoms, and he discovered little negatively-charged bits in the atom, which he called "corpsucles". These were later renamed to "electrons".
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The Spanish were blamed for the destruction of Maine, and propaganda led to war.
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Found by J.J. Thomson, this model of the atom contained electron inside a ball of positive charge. It was proven wrong by the Gold Foil Experiment.
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A horrible earthquake took place in San Francisco that started several fires, that raged on for many days.
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These experiments involved shooting particles into a thin foil. These tests showed that the atom has a central nucleus, disproving the Plum Pudding Model of the Atom.
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On this day, the ship Titanic hit an iceberg and sank, killing many people.
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After the discovery of an atomic nucleus, Niels Bohr published a model of an atom with electrons orbiting a positively charged nucleus.
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Archduke Franz Ferdinand was assassinated by 6 people, thus sparking a major war.
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Henry Mosely discovered a pattern in X-ray results of atoms, and graphed it into a line. He found that each element has a special atomic number.
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Erwin Schrödinger created an equation that explains the changes to matter with time.
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On this date, the stock market crashed, causeing a huge deflation, and leaving many citizens extremely poor.
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Bothe and Becker smashed particles with beryllium, and discovered bits of the atom with no charge, which are known today to be neutrons.
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Nazi Germany invaded Poland on this day, starting the second world war.