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Marie Curie Slide Show
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Marie Curie
Marie Sklodowska Curie discovered the mysterious element radium.
She started off by studying a variety of chemical compounds that contained uranium. She discovered that the strength of the rays that came out depended only on the amount of uranium in the compound. It had nothing to do with whether the material was solid or powdered, dry or wet, pure or combined with other chemical elements. If you had a certain amount of uranium—a certain number of uranium atoms—then you got a certain intensity of radiation.
Marie used this “Curie electrometer” to make exact measurements of the tiny electrical changes that uranium rays caused as they passed through air. Great care was needed to get reliable numbers. As she measured the rays from different uranium compounds, she discovered that the more uranium atoms in a substance, the more intense the rays the substance gave off. Trying to see what was so special about uranium, she tested minerals containing other elements. She found that thorium compounds also gave off “Becquerel rays.”
What did she dicover about rays?
Birth: November 17, 1867
Death: July 4, 1934
She discovered that the strength of the rays that came out depended only on the amount of uranium in the compound.
What did Marie Curie use to measurements of the tiny electrical changes that uranium rays caused as they passed through air?
http://www.aip.org/history/curie/brief/03_radium/radium_1.html
Curie Electrometer
What did Marie discover?
Radium