By Juan Morales
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Name: Astatine
Symbol: At
Atomic Number: 85
Atomic Mass: (210.0) amu
Melting Point: 302.0 °C (575.15 K, 575.6 °F)
Boiling Point: 337.0 °C (610.15 K, 638.6 °F)
Number of Protons/Electrons: 85
Number of Neutrons: 125
Classification: halogen
Density 293 K: Unknown
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Date of Discovery: 1940
Discoverer: D.R. Corson
No known uses
Obtained From: Man-made
In chemical reactors
The name astatine came from the Greek
word “astanos” witch means unstable
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Astatine is one of the
rarest items in the
universe. Scientist
think that no more then
25 grams exist on
earth.

Cant be seen with the
human eye because its
so radio active that a
big enough sample
would just disintegrate
due to its radioactivity.
Discovered in :1869
Discoverer :D.R Carson
Factory produced :1940
Astatine was made by bombarding bismuth-209 with
alpha particles in a cyclotron (particle accelerator) to
produce, after emission of two neutrons, astatine211. The scientists found that the isotope they
created was radioactive, so they named the element
using the Greek ‘astatos’ meaning unstable.