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Uranium
Beginning of essay
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 Ura ....
Middle of essay
....s or daughters, each of which has a
characteristic disintegration rate, a constant of nature that man has never been
able to alter. The proportion of each radioelement in the ore is inversely
proportional to its rate of disintegration. Radium is the fifth radioactive
descendant in the chain from uranium to lead, its daughter is the gas radon, and
polonium is the last radioelement before lead. The discovery of Uranium changed
the world as we knew it, from its physical and chemical properties we c.... |
| Number of words: 394 |
Approximate pages: 2 |
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