..." in Physics if there is no answer or all answers are wrong, use a search bar and … It is the rarest naturally occurring element in the Earth's crust, occurring … Astatine was never a metalloid, and polonium has been included and is now excluded from that list even though it touches the "stair-step" line. More importantly, it is not clear whether condensed astatine (before it vaporizes) would behave as a diatomic halogen or as a metal--or possibly as some intermediate between the two.

Boron sometimes is excluded, by itself, or with silicon. It is still being debated whether or not Astatine is a metalloid or a non-metal due to the fact that it is highly unstable and radioactive it makes it hard for scientists to decide whether or not it is a metalloid … HAt and CH 3 At have been detected. Astatine is not a metalloid but a nonmetal; astatine is a solid because is more heavier than fluorine. Lists of metalloids differ since there is no rigorous definition of metalloid (or its occasional … The latest thinking is "no". Related Questions. Astatine generally has to be synthesised artificially by nuclear reactions – it was first made this way in 1940 by scientists at the University of California at Berkeley. According to the Wikipedia article on astatine, the longest-lived isotope has a half-life of 8.1 hours.The element is so radioactive that large samples would melt and vaporize under the heat generated by its own radioactivity.
Astatine is a solid nonmetal.

Astatine probably is capable of accumulating in the human thyroid gland . The elements that ARE metalloids are B, Si, Ge, As, Sb and Te. Boron, silicon, germanium, arsenic, antimony, and tellurium are recognised commonly as metalloids. But Hermann remains optimistic. The interhalogen molecules AtI, AtBr, and AtCl are known, although it has not been determined whether or not astatine forms diatomic At 2. Depending on the author, one or more from selenium, polonium, or astatine are sometimes added to the list. Wiki User February 22, 2010 9:01PM. Get an answer to your question "What is astatine: a non-metal, a metalloid, or a metal? Sometimes tellurium is not regarded as a metalloid. It is so radioactive that a lump of solid astatine would be vaporised almost instantly. Is Astatine a non metal or a metalloid? Astatine is a radioactive chemical element with the symbol At and atomic number 85. The current interpretation of metalloid does not include At or Po. Unknown. Answer. I'm having a difficult time figuring out if Polonium and Astatine are regarded as a metal, a metalloid or a nonmetal. At ptable Polonium is listed as a metalloid and Astatine as a nonmetal.. At Royal Society of Chemistry neither Polonium or Astatine are regarded as a metalloid, but a metal and a nonmetal.. Dummies.com groups Polonium as a metal and Astatine as a metalloid. ‘With active cooling of the substrate one might be able to stabilise a thin film for a sufficiently long time,’ he says. Is astatine metal or non metal? Home; Random; Nearby; Log in; Settings; About Wikipedia; Disclaimers

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