HISTORY OF THE ATOM

WILLIAM RÖNTGEN

• Born on March 27 1845 in Remscheid, Germany
• In November of 1895 he defined radioactivity by discovering the X-Ray
• Through the experiment of cathode Rays, he discovered that atoms were negatively charged molecules

HENRI BECQUEREL

• Born on December 15, 1852, in Paris, France.
• He showed matter can emit energy by itself, without first being 'charged' by the sun
• He left uranium salt crystals in the sun to absorb energy when he realized he didn't need to charge them.

MARIE CURRIE

• She was born November 7, 1867, in France
• She discovered radium and polonium and named them
• She took Henry Becquerels work further by doing her own experiments on uranium rays
• The Rays remained constant no matter the form of uranium
• Her theory was the came from the elements atomic structure
• Her idea created the field of atomic physics