Periodic Table Elements

Events

Discovery of Magnesium

1755

Discovery of Hydrogen

1766

Discovery of Strontium

1790

Discovery of Beryllium

1798

Discovery of Sodium

1807

Discovery of Potassium

1807

Discovery of Calcium

1808

Discovery of Barium

1808

Discovery of Lithium

1817

Discovery of Caesium

1860

Discovery of Rubidium

1861

Discovery of Helium

1868

Discovery of Argon

1894

Discovery of Neon

1898

Discovery of Krypton

1898

Discovery of Radium

1898

Discovery of Xenon

1898

Discovery of Radon

1900

Discovery of Francium

1939

Discovery of Oganesson

2006