Voorbeelden van astatine

• The lowest element in this group is also a highly radioactive and rare element, astatine.

• Fluorine and astatine are halogens.

• What is the physical state of astatine at room temperature?

• She discovered that the element 85 astatine is a product of the natural decay processes.

• Accordingly, much less is known about astatine than most other elements.

• Four out of these isotopes (astatine-215, astatine-217, astatine-218, and astatine-219) are found due to their production in major natural decay chains.

• The least stable ground state isotope is astatine-213, with a half-life of 125 nanoseconds.

• Even though heavier astatine isotopes release less energy, no long-lived astatine isotope exists, due to the increasing role of beta decay (electron emission).

• All of its isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours.

• There are 32 known isotopes of astatine, with atomic masses (mass numbers) of 191 and 193223.

• Astatine, which is usually classified as a nonmetal or a metalloid, has been predicted to have a metallic crystalline structure.

• Francium is a highly radioactive metal that decays into astatine, radium, and radon.

• While hydroiodic acid solutions are stable, the hydronium-astatide solution is clearly less stable than the water-hydrogen-astatine system.

• Astatine may be dark, or it may have a metallic appearance and be a semiconductor, or it may even be a metal.

• The properties he reported for dakin do not correspond to those of astatine, and the true identity of dakin is not known.

• A visible piece of astatine would be immediately and completely vaporized due to the heat generated by its intense radioactivity.

• The least stable one is astatine-214m1; its half-life of 265 nanoseconds is shorter than those of all ground states except that of astatine-213.

• Astatine-219 decays to polonium-215, which itself beta decays to astatine-215 with an even smaller probability of 0.00023%.