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Social gatherings began
Antoine Lavoisier began to set up social gatherings to bring people on board to his ideas. -
Discovery of Postassium
Humphrey Davy used electricity to rip apart a chemical, which lead to the discovery of the element- potassium. -
Mendeleev's periodic table
Mendeleev published a periodic table, leaving blank spots for future elements that would be discovered. He made predictions of these future elements in an article, which ended up being spot on. -
Discovery of gallium
A chemist discovered a metal so soft it melted in his hand, calling it gallium. This was to be placed in the empty spot under aluminum, but did not match Mendeleev's predictions. After double checking his work, Mendeleev's predictions were correct. Even more accurate than the chemist who had discovered the element, without even having it himself. -
Element Mendeleev would never accept
The element Radium struck Chemists with confusion. Mendeleev refused to accept the properties of this element. The thought of transmutation from one element to another was a preposterous idea. -
X-Rays redefine the periodic table
Harry Moseley used X-rays to redefine the periodic table. Discovering that the elements should not go in order by atomic weight- but by atomic number. The number of protons in the atoms nucleus should be the way the elements are set up. -
The death of Harry Moseley
Harry Moseley redefined the periodic table. He had much of his life ahead of him until deciding to serve his country and fight in the war. He had many more abilities to offer as a scientist to change the world. However, his time was cut short at 27 years old when he was shot in the head in Turkey. -
Scientists on the home front
The death of chemist Harry Moseley in war was a tragedy among the people. His death had a huge impact on how scientists roles were going to be played in the war. The British decided that people with that kind of scientific ability would no longer be put on the front line to fight. They should be spending their war years working on radar and code breaking. -
The first artificial element
Glenn Seaborg created one of the first artificial elements: Plutonium. -
Period: to
Revealing the secret weapon
After discovering the properties of plutonium, they held off on publicly announcing its use in atomic bombs. Not until after WW2 was over did they release the information of the elements being used in their weapons that ultimately ended the war. -
Weapons from Plutonium
July 16th, 1945, scientists from Los Alamos went to a desert for the first testing of an atomic bomb. This bomb was made from plutonium. -
Bombing of Hiroshima
3 weeks after the testing of the plutonium atomic bomb, a bomb made of a different element, uranium, was dropped on Hiroshima by an American bomber, killing 100,000 Japanese. -
Destruction of Nagasaki
Just 3 days after tragedy struck Hiroshima, a plutonium bomb was then dropped on Nagasaki. This ultimately led to the end of WW2.
