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Astatine
(At)
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2
8
18
32
18
7
Animation
At
Category
Halogen
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Relative atomic mass
210
Density
7
Melting point (°C)
302
Boiling point (°C)
337
Electronegativity (Pauling)
2.2
Half-life
7.21 h
Discovery year
1940
Discovered by
Pierre Curie
Marie Curie
Electrons: 85
Protons: 85
Neutrons: 125
Wikipedia
Decay chain
At-211
(7.21 h)
EC decay
Po-211
(0.516 s)
α decay
Pb-207
(stable)
stable
created by @lukaswyss
Astatine (At) – Element 85
