Astatine [+]Compare [E]dit [H]istory

Aliases: At

Object «Astatine» was created due to

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Object «Astatine» has attributes

Attribute Value
Symbol At
Atomic number 85
Group name Halogen
Standard state Solid
Atomic mass 209.98715 u
Electron configuration [Xe]6s²4f¹⁴5d¹⁰6p⁵
Oxidation states
  • -1
  • 1
  • 3
  • 5
  • 7
Electronegativity (pauling scale) 2.2
Atomic radius (van der waals) 202 pm
Ionization energy 9.5 eV
Electron affinity 2.8 eV
Melting point 575 K
Density 7 g/cm³
Discovered 1940 year
Boiling point Add

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There was one edit, no edits waiting approval. Last edited by fink.isabella(237), Jun 1, 2022 (18 fields were changed)
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