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US/World-Beginning of the Civil War
The American Civil War was a war fought between the Union and Confederacy. The Union, made up the northern states, wished to keep the United States together where as the Confederacy, made up of mostly southern states, wished to break away and form their own country. -
US/World-Gettysburg Adress
Four and a half months after the battle at Gettysburg, Abraham Lincoln returned to give a dedication speech for the Solider's Nation Cemetery. His speech is known as one of the greatest in American history, also shifting the main focus of the Civil War towards the abolition of slavery. -
Chemistry-The Law of Octaves
This law was made by the English physicist J.A.R Newlands. This law was used as the periodic pattern in the Periodic Table. The law stated that all elements should go in order by their atomic number. An atomic number is the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table. -
US/World-President Lincoln's Assassination
President Lincoln was shot while attending a play at Ford's Theatre. John Wilkes Booth shot him in the head using a derringer pistol. Lincoln died the next morning. -
US/World-Impeachment of Andrew Johnson
The 17th president of the United States was impeached because he broke the Tenure of Office Act, stating that he could not remove government officials without Senate approval. He was acquitted by only 7 votes. -
Chemistry-Mendeleev’s Periodic Table
The periodic table was created by the Russian chemist and inventor, Dmitri Mendeleev, in 1869. This table is the arrangement of the chemical elements by their atomic number (number of protons in the nucleus), electron configurations, and repetitive chemical properties. Electrons are the negative charge of the molecule and the protons are the positive charge of the molecules. -
Chemistry-Discovery of the Proton
The English physicist Eugen Goldstein made the discovery of the proton in 1886. He used the Cathode ray experiment as did J.J. Thomson in 1897. Goldstein also used canal rays that showed a stream that traveled in the opposite direction as the electron flow which was the proton. -
Chemistry-Discovery of the Electron
The discovery of the electron was made by J.J. Thomson in 1897. Thomson was an English physicist who used the Cathode Ray Experiment to make the discovery. Thomson showed that electrons comprising cathode rays were roughly 2,000 times smaller in mass than the hydrogen ion contradicting the popular belief that the hydrogen atom is the smallest atom. -
US/World-Beginning of Spanish American War
The Spanish American War began because of a conflict between Spain and the United States. When the U.S.S. Maine was sunk in the harbors of Cuba, it instituted a war that would end in Spain's rule over Cuba and Latin America being broken. -
Chemistry-Plum Pudding Model
Plum Pudding Model VideoThis model was proposed by the English physicist J.J. Thomson in 1904. His model explained emission lines which are lines that appear in a spectrum if the source emits specific wavelengths of radiation. Thomson explained these lines by assuming his electrons were trapped in a continuous blob of positive charge. -
US/World-Great San Francisco Earthquake
A magnitude 7.8 earthquake hit the northern coast of California. This caused the death of about 3000 people and the destruction of 80% of San Francisco. -
Chemistry-Rutherford’s Gold Foil Experiment
Rutherford’s Gold Foil Experiment was conducted in 1911 by Hans Geiger and Ernest Marsden at the suggestion of Ernest Rutherford. They came up with the theory that positive and negative charges were spread evenly within the atom and this experiment was focused on shooting tiny particles at a thin sheet of gold. The team ended up discovering that a few of the particles were deflected and that an atom’s mass is concentrated at its center. -
US/World-Titanic Disaster
The brittish passenger ship known as Titanic sank in the north Atlantic Ocean after collision with an iceburg, The ship thought to be unsinkable ironically sank on its maided voyage. -
Chemistry-Moseley / Atomic Numbers
The English physicist Henry Moseley used x-rays to discover that the protrons in he nucleus directly relate to the wavelength and frequency of each element atom. This allowed for elements to be placed in the periodic table by atomic number without missing any in the order. -
US/World-World War I
When Archduke Franze Ferdinand of Austria was assassinated in Sarajevo Bosnia, it lead to a war between the Central Powers, consisting of Germany, Austria-Hungary, and the Ottoman Empire against the Allies, which consisted of Great Brittan, France, Russia, Italy, Japan, and the United States. -
Chemistry-Bohr’s Planetary Model of the Atom
The Bohr Model was proposed by the Danish physicist Niels Bohr in 1915. This model is both used as a symbol for atomic energy and to show how protons and neutrons occupy the space inside a nucleus. The model also showed how the electrons orbit the nucleus. -
Chemistry-Schrodinger Equation
This equation was published by Erwin Schrodinger, an Austrian physicist, in 1926. The equation was used to determine the probability of events or outcomes. The equation was said to describe what a system of quantum objects’ particles will do in the future based on its current state. -
US/World-Great Depression
The Great Depression is the longest and most devistating downturn of the western industrialized world. Lasting about 10 years, the Great Depression brought inflation, unemployment, and poverty to the United States. This would not fully recover until World War II when the economy got a large war-based boost. -
Chemistry-Discovery of the Neutron
James Chadwick discovered the neutron in 1932. He was an English physicist who had worked with both Rutherford and Geiger. Chadwick conducted an experiment using a sample of Beryllium and bombarding it with alpha particles. He also used radiation and as a result, he discovered the radiation discharged protons, meaning the particles had to be more massive than previously expected. The more massive particles were called neutrons. -
US/World-Beginning of World War II
Known as one of the deadliest conflicts in history, World War II . When Germany invaded Poland and Japan invade China, countries were forced to pick sides. Two groups emerged. The Allies and the Axis. The war ended with the use of atomic bombs on Japan and the end of the Haulocaust in Germany.
