85
At
Astatine
210.0 u
Astatine
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Cite "Astatine"
Astatine. (n.d.). In Element. Retrieved from /element/at/
"Astatine." Element, /element/at/.
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Period
6
Group
17
Block
p-block
Phase (STP)
Solid
Astatine is the rarest naturally occurring element on Earth. Only about 25 grams exist in the crust at any time.
More Halogen
Frequently Asked Questions
What is Astatine?
Astatine (At) is a chemical element with atomic number 85. It is a solid at standard temperature and pressure, classified as a halogen.
What are the key properties of Astatine?
Astatine has an atomic mass of 210.0 u.
What is the electron configuration of Astatine?
The electron configuration of Astatine is [Xe] 4f14 5d10 6s2 6p5. It is in the p-block of the periodic table.
What is the electronegativity of Astatine?
Astatine has an electronegativity of 2.2 on the Pauling scale.