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.
 There are several subgroups of Jews with different culture and traditions: Ashkenazic: Descendants of Jews from France, Germany and Eastern Europe. Sephardic: Descendants of Jews from Spain, Portugal, North Africa and the Middle East. Mizrachi: Descendants of Jews from North Africa and the Middle East.shkenazic 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.