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  1. Marie Curie (5862 bytes)
    5: ...her diligent work ethic, neglecting even food and sleep to study. After graduating from high school, s...
    11: ...diation phenomena discovered by Professor [[Henri Becquerel]]". She was the first woman to be awarded a Nobe...
  2. Age of the Earth (20052 bytes)
    19: ... perpetual change, eroding and reforming continuously, and the rate of this change was roughly constan...
    39: ...hen the French chemist [[Henri Becquerel|A. Henri Becquerel]] discovered [[radioactivity]]. In [[1898]], two ...
  3. Polonium (10219 bytes)
    95: ...issolves readily in dilute [[acid]]s, but is only slightly [[solubility|soluble]] in [[alkali]]s. It ...
    104: ...re above 750 K. A few [[curie]]s ([[Becquerel|gigabecquerels]])of polonium-210 emit a blue glow which is caus...
    123: ... body burden for ingested polonium is only 1100 [[becquerels]] (0.03 microcurie), which is equivalent to a pa...
  4. Radon (12616 bytes)
    142: ... taken starting from concentrations of 400&nbsp;[[Becquerel|Bq]]/m<sup>3</sup> for old houses, and 200&nbsp;B...
  5. Radium (13138 bytes)
    144: The SI unit of radioactivity is the [[becquerel]] (Bq), equal to one disintegration per second. ...
  6. Technetium (32113 bytes)
    189: The metal form of technetium slowly [[tarnish]]es in moist air. Its [[oxide]]s ar...
    191: The metal form is slightly [[paramagnetism |paramagnetic]], meaning it...
    205: ...half-life means that this emission decreases very slowly with time. It can also be extracted to a hig...
    211: ...dded. The radioactive nature of technetium (3 M[[Becquerel|Bq]] per liter at the concentrations required) ma...
    229: ...ultidict'', "Technetium" }} The sample had previously been bombarded by [[deuterium]] nuclei in the [[...
  7. Uranium (27752 bytes)
    161: ...ter than [[steel]]. It is malleable, ductile, and slightly [[paramagnetic]]. Uranium metal has very hi...
    172: ...d if there is nothing to absorb some neutrons and slow the reaction, it is explosive. The first atomic...
    191: ...ctivity|radioactive]] by French physicist [[Henri Becquerel]] in [[1896]], who first discovered the process o...
    197: ...m the Belgian Congo, but they were pursued vigorously to ensure nuclear self-sufficiency. Similar effo...
    204: ...popular opposition, and finally the [[Three Mile Island]] nuclear accident in [[1979]], all of which l...
  8. Physics (25628 bytes)
    91: The willingness to question previously held truths and search for new answers resulted ...
    112: ...oactivity]] was discovered in [[1896]] by [[Henri Becquerel]], and further studied by [[Maria Sklodowska-Curi...
    116: [[Henri Becquerel]] accidentally discovered [[radioactivity]] in [[...

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