The Dark Ages

The Dark Ages

400

The European Dark Ages

Period: 400 to Jan 1, 1400

Alchemy

Jan 1, 1000

Alchemists tried to change lead into gold

Jan 1, 1000

renaissance

Jan 1, 1400

Naming The Elements

Jan 1, 1751

The Plum Pudding Model (made by

Jan 1, 1897

Rutherford's Atom - Theory 2

Jan 1, 1910

Bohr's Atom - Theory 3

Jan 1, 1913

Cold War - The Race Between

Jan 1, 1947

Helium

Jan 1, 2013

Helium was discovered in 1868 by P.Janssen & J.N.Lockyer

Hygrogen

Sep 19, 2013

Hydrogen is the lightest element ever!it was discovered in 1766 by H.Cavendish