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Marie and Pierre Curie Discover Radium (1898) Options
Daemon
Posted: Thursday, December 21, 2017 12:00:00 AM
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Marie and Pierre Curie Discover Radium (1898)

Scientists Marie and Pierre Curie were working with pitchblende, a heavy mineral known to contain the radioactive element uranium, when they noticed something unusual. Somehow, the pitchblende was more radioactive than the uranium it contained. The culprit was radium, a previously unknown element present in pitchblende only in trace amounts—yet more than a million times more radioactive than uranium. What common household products contained radium until it was discovered to be dangerous? More...
KSPavan
Posted: Thursday, December 21, 2017 4:48:28 AM

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This Day in History
Marie and Pierre Curie Discover Radium (1898)
Scientists Marie and Pierre Curie were working with pitchblende, a heavy mineral known to contain the radioactive element uranium, when they noticed something unusual. Somehow, the pitchblende was more radioactive than the uranium it contained. The culprit was radium, a previously unknown element present in pitchblende only in trace amounts—yet more than a million times more radioactive than uranium.
raghd muhi al-deen
Posted: Thursday, December 21, 2017 1:50:52 PM

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chemical element

with my pleasure
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