Astatine mass number range

Several chlorine isotopes exist with mass numbers ranging between 32 and 40. The two stable isotopes are Cl and Cl with natural abundances of 75.77% and 24.23% respectively, while the others are radioactive. Bromine also has two stable isotopes, Br and Br, with natural abundances of 50.69% and 49.31% respectively, while the others are radioactive. Iodine has only one stable isotope, and numerous radioactive ones are known. Astatine is known only as its radioisotope see Radioactive Decay). [Pg.739]

Astatine At 85 artificial isotopes only mass number range 205-211... [Pg.875]

The most stable isotope of astatine is °At, which has a half-life of 8.1 hours. Other isotopes have mass numbers ranging from 193 to 223 and half-lives ranging from 125 nanoseconds ( At) to 7.2 hours ( At). Astatine is known to form interhalogen compounds with bromine (AtBr), chlorine (AtCl), and iodine (Atl). Additional compounds (HAt and CHjAt) have also been detected. [Pg.93]

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