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feb 17, 1898 - Marie and Pierre Curie discover that thorium gives off "uranium rays," which Marie renames "radioactivity." Marie and Pierre Curie discover polonium and announce the existence of another new radioactive element they name radium. Paul Ulrich Villard

Description:

- discover that thorium gives off "uranium rays," which Marie renames "radioactivity."
- discover polonium and announce the existence of another new radioactive element they
name radium.
- discovers gamma rays.

Added to timeline:

Radiation Timeline

ByJoshua Ha
8 Jun 2018
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521

Date:

feb 17, 1898
Now
~ 127 years ago

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