Marie and Pierre Curie proved the existence of the new element radium when they chemically isolated one-tenth of a gram of pure radium chloride.
21st June 1919: The German High Seas naval fleet is scuttled at Scapa Flow
21st June 2019
While Mendeleev’s approach led to there being some gaps or spaces in ‘periods’ where he believed an element should exist, he was able to calculate the missing element’s atomic mass and properties.
Thomas Midgeley Jr. discovered that adding tetraethyl lead to gasoline reduced knocking in automobile engines.
The DuPont company’s organic chemist Wallace Carothers received a patent for linear condensation polymers, the basis of the material better known as nylon.
On the 6th March 1869, Russian chemist Dmitri Mendeleev presented his periodic table to the Russian Chemical Society.
The first U.S. patent was awarded to Samuel Hopkins for an improvement ‘in making Pot ash and Pearl ash by a new Apparatus and Process.’
HistoryPod Extra: The Myth of Gavrilo Princip’s Sandwich
28th June 2015
11th November 1918: WW1 Armistice of Compiègne is signed
11th November 2022
11th November 1918: WW1 Armistice of Compiègne is signed
11th November 2022
1st September 1939: Nazi Germany invades Poland
1st September 2018