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:
“Whether considered as a doctrine, or as an historical fact, or as a movemement, socialism, if it really remains socialism, cannot be brought into harmony with the dogmas of the Catholic church.... Religious socialism, Christian socialism, are expressions implying a contradiction in terms.”
—Pius XI [Achille Ratti] (1857–1939)
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