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Uranium
Beginning of paper
was discovered in the 1700's in the coal mines of bohemia and
Jachlovikna. 's atomic number is 92, its Symbol is U and the atomic mass
of is 238.0289. Miners called it Pechblende meaning, Pechblende, from
the German words pech, which means either pitch or bad luck, and blende, meaning
mineral Uranium's first full analysis was done on 1789 by Mar ....
Middle of paper
....velopment
of the X-ray. Uranium is weakly radioactive, decaying slowly but inexorably at
the rate of one milligram per tonne per year. It is transformed into inactive
lead through a chain of radioelements or daughters, each of which has a
characteristic disintegration rate, a constant of nature that man has never been
able to alter. The proportion .... |
| Word count: 394 |
Page count: 2 |
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