All other polonium isotopes are short-lived except polonium-210 (half-life about 138 days), which is the most commonly used isotope. It is prepared by bombarding bismuth with neutrons in a nuclear reactor.olonium has 34 isotopes, more than any other element. All of these isotopes are radioactive. The most stable, polonium-209, has a half-life of about 103 years. Polonium-208 (half-life about 3 years) is the only other polonium isotope with a half-life over one year.
Ashkenazi Jewish genetic diseases are a group of rare disorders that occur more often in people of Eastern European (Ashkenazi) Jewish heritage than in the general population.
Ashkenazic Jews are the Jews of France, Germany, and Eastern Europe and their descendants. The adjective Ashkenazic and corresponding nouns, Ashkenazi (singular) and Ashkenazim (plural) are derived from the Hebrew word Ashkenaz, which is used to refer to Germany.lthough some individual Sephardic Jews are less observant than others, and some individuals do not agree with all of the beliefs of traditional Judaism, there is no formal, organized differentiation into movements as there is in Ashkenazic Judaism.