It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is …

astatine (At), radioactive chemical element and the heaviest member of the halogen elements, or Group 17 (VIIa) of the periodic table.

Oct 16, 2024 · Astatine (At) is a rare and highly radioactive element with atomic number 85. It is part of the halogen group (Group 17) in the periodic table, which also includes fluorine, …

A mass spectrometer has been used to confirm that astatine behaves chemically like other halogens, particularly iodine. Astatine has no known biological role. It is toxic due to its …

Chemical element, Astatine, information from authoritative sources. Look up properties, history, uses, and more.

Astatine is highly radioactive and is only available in tiny quantities. Its properties are inferred from its position in the periodic table and by studying its chemistry in extremely dilute solutions. Like …

Astatine (chemical symbol At, atomic number 85) is the rarest naturally occurring chemical element. It is a member of the halogen family of elements and is the heaviest halogen. Its …

It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is …

Astatine is a shiny dark colored element. Astatine is a radioactive element. It is a semiconductor and can have metallic properties. Astatine undergoes sublimation but less readily than iodine …

Astatine (At) is a rare and highly radioactive chemical element, classified as the heaviest member of the halogen group, which also includes fluorine, chlorine, bromine, and iodine. Its atomic …