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Astatine-211 is sometimes used as a radioactive tracer and in cancer treatment. Like iodine, it is known to accumulate in the thyroid gland.

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Physical:

Melting point: 575 [or 302 °C (576 °F)] K

Boiling point: 503 [or 230 °C (446 °F)] K

Density of solid state: 6400 (estimated) kg m^-3

Chemical:

HIGHLY RADIOACTIVE!!

(similar properties to iodine)

Note: Astatine has been little researched due to its short half-life; it is found only in minute amounts. It is currently the rarest naturally occurring element, with less than 30 grams estimated to be contained in the entire Earth’s crust.

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Contains element name, symbol, atomic number, and atomic mass.

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http://www.pakalertpress.com/wp-content/uploads/2011/11/Radioactive_236.jpg

http://www.scholastic.com/content/images/articles/sn_ts/sn_ts_052913_fixed.jpg

http://www.webelements.com/astatine/

http://www.raci.org.au/document/item/397

http://www.chemicool.com/elements/astatine.html

http://www.lookchem.com/Periodic-Table/Astatine/

http://theodoregray.com/periodictable/Samples/Davidite3/s13s.JPG

http://www.chemicalelements.com/bohr/b0085.gif

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"Astatine" comes from the Greek "astatos," meaning "unstable."

Astatine was discovered by Dale Corson, MacKenzie, Segre in 1940 in California.

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Astatine is a nonmetal

Family Name: Halogen

Solid at room temperature