Historical Applications
Some of the few practical uses of radium are derived from its radioactive properties. More recently discovered radioisotopes, such as 60Co and 137Cs, are replacing radium in even these limited uses because several of these isotopes are more powerful emitters, safer to handle, and available in more concentrated form.
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Famous quotes containing the word historical:
“The past itself, as historical change continues to accelerate, has become the most surreal of subjects—making it possible ... to see a new beauty in what is vanishing.”
—Susan Sontag (b. 1933)
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