Periodic Table

New chemical element discovery

Sep 30, 1649

Hennig Brand a bankrupt german tried to discover the philosopher's stone, but failed and instead discovered the chemical element phosphorous.

Element discovery

May 30, 1809

At least 47 elements were discovered

Classifying the elements

Dec 30, 1817

Johann Wolfgang Döbereiner started to trying to formulate the periodic table and classify the elements.

Formulation of chemical elements

Jul 30, 1829

Johann Wolfgang Döbereiner, discovered that some of the chemical elements with similar chemical properties could be put into groups of three.

More Copies of the Periodic table

Oct 30, 1864

The English chemist William Odling also drew up a table that was similar to the table published by Mendeleev.

Classifying elements into groups

Sep 30, 1865

John Newlands classified 56 known elements into eleven groups based on their physical properties.

Periodic Table first Published

Oct 30, 1869

There is a lot of history put into the periodic table, it was first published by Dimitri Mendelev, other scientists did have there input but the he was more well known as being the sole creater.

Discovery

Mar 30, 1886

French physicist Antoine Bequerel first discovered radioactivity.

Rutherford discovery

Nov 30, 1903

Rutherford discuessed that radioactivity is caused by the breakdown of atoms.

James Chadwick

Feb 28, 1932

James Chadwick first discovered neutrons, and isotopes were also identified

Lanthanides and actinides

Mar 30, 1945

Glenn Seaborg identified lanthanides and actinides.