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Definition of the Astatine Element
A highly unstable
radioactive element, the heaviest of the halogen series, that
resembles iodine in solution.
Origin / Meaning of the name Astatine
The name originates
from the Greek word 'astatos' meaning unstable.
Classification of the Astatine Element
Astatine is
classified as an element in the 'Halogens' section which can be
located in group 7 of the Periodic Table. The term "halogen" means
"salt-former" and compounds containing halogens are called
"salts". The halogens exist, at room temperature, in all three
states of matter - Gases such as Fluorine & Chlorine, Solids such
as Iodine and Astatine and Liquid as in Bromine.
Facts about the
Discovery and
History of the Astatine
Element
Astatine was discovered in
University of California, Berkeley, USA by Dale R. Corson,
K. R. MacKenzie, and Emilio Segre
in 1940.
Occurrence the Astatine Element
The total amount of
astatine in Earth's crust is estimated to be less than 1 oz (28 g)
at any one time
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