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Beginning of the Civil War
The Civil War was between the Union and the Confederate Armies to determine the survival of the Union or the independence of the Confederacy -
Gettysburg Address
president Abraham Lincoln was invited to deliver remarks, which later became known was the Gettysburg Address., at the offical dedication ceremony for the National Cemetary of Gettysburg in Pennsylvania. In Lincoln's speech he invoked principles of human equality contained in the Declaration of independence and connected the sacrfices of the Civil War with the desire for a new birth of freedom as well as preservation of the Union created in 1776 and its idea for self-government. -
Chemistry - Law of Octaves
Generalization made by Chemist J.A.R. Newlands in 1865, If chemical elements are arraged according to increasing atomic weight, those with similar physcial and chemical properties occur after each interval of seven elements. -
President Lincoln Assassinated
John Wilkes Booth, a famous actor and Confederate sympathizer, fatally shot President Abraham Lincoln at a play at Ford's Theatre in Wshington, D.C. The attack came only five days after Cnfederate General Robert E. Lee surrendured his massive army at Appomattox Court House, Virginia, ending the Civil War. -
Andrew Johnson Impeached
Andrew Johnson was the first president to be impeached. He had 11 articals of impeachment against him. It was caused by a polictical conflict. -
Mendeleev's Periodic Table
Dimitri Mendeleev used John Newlands' groupings and organized them in what is called the Periodic Table. He left spaces for new elements that were yet to be discovered. -
Beginning of the Spanish American War
The war originated in the Cuban struggle for independence from Spain, which began in Febuary 1895. Spain's brutally repressive measures were shown to the U.S. public and American sympathy for the rebels rose. The U.S. demanded th withdrawal of Spain's armed forces from Cuba. Spain declared war on the United States Arpil 24 followed by the U.S. declaration of war on the 25th. -
Plum Pudding Model
plum pudding model
JJ Thomson found out that a negatively charged partical is more than 2000 times ligter than a hydrogen atom. -
Discovery of the Electron
JJ Thomson discovered that an electron is a constituent of all matter we are sounded by. All atoms are made of a nucleus and electrons. -
Chemistry - Rutherford's Gold Foil Experiment
In 1899 Ernest Rutherford studied the absorbtion of radioactivity by thin sheets of metal foil and found two components: alpha radiation, which is absorbed by a few thousandths of a centimeter of metal foil, and beta radiation, which can pass though 100 times as much foil before it was absorbed. Shortly thereafter, a third form of radiation, named gamma rays, was discovered that can penetrate as much as several centimeters of lead. -
Titanic Disaster
Massive ship which carried 22,000 passengers and crew had struck an iceberg and becan to sink killing many of the passangers and crew in the freezing waters. -
Bohr's Planetary Model of the Atom
Neils Bohr discovered that the atom is a small with a charged nucleus surrounded by electrons that travel in a circular orbit around the nucleus. -
Moseley/Atomic Numbers
English physicist Henry Mseley discovered that the wavelength of x-rays became shorter as the atomic weight increased. moseley suggested that this regular increase from element to element must be caused bu smething in the atom. This something was the positive charge. He referred to this charge as the atomic number. -
World War I
Archduke Franz Ferdinand of Austria was assassinated by a Serbian nationalist in Sarajevo, Bosnia. An escalation of threats and mobilization orders followed the incident, leading by mid-August to the outbreak of World War I, which pitted Germany, Austria-Hungary and the Ottoman Empire against Great Britain, France, Russia, Italy, And Japan. -
Discovery of a Proton
Ernest Rutherford discovered that the Proton was a candidate to be a fundamental pertical. It is a building block of nitrogen and all other heavier atomic nuclei. -
Great Depression
The Great Depression was the deepest and longest lasting economic downturn in the history of the western industrialized world. Started in America after the stock market crash sending wall street into panic. -
Discovery of the Neutron
In 1919 Rutherford discovered the proton but other researchers found that the proton did not seem to be the only partical in the nucleus. James Chadwick studied atomic disintegration and kept seeing the atomic number was less than the atomic mass. Rutherford put out the idea that there could be a partical with no charge but mass but no evidence proved his idea. Chadwick repeated the experiments of scientists looking into that idea. He was able to disvocer that a neutron did exist. -
Beginning of World War II
World War II began before dawn even had the opportunity to break in September 1939 when German Forces tore into Poland. For the better part of the next six years, war consumed the globe. -
Schrodinger Equation
Erwin Schrodinger, while at a sanatorium in Arosa, formed the basis of wave mechanics and formulated the wave equation or the Schrodinger Equation. This was a fundamental equation of physics for describing quantum mechanical wave behavior.
