Atomic Properties of At
- Atomic Number of At
- 85
- Atomic Mass of At
- 210.0000 u
- Electron Configuration
- [Xe] 4f14 5d10 6s2 6p5
- Electronegativity
- 2.20
- Block
- p-block
- Group
- 17
- Period
- 6
Astatine is the halogen no one sees very often. Not because she is avoiding people — though she kind of is — but because she simply does not stick around long. She appears briefly, gives off an air of quiet mystery, and then fades away before anyone can ask too many questions.
Even though she is elusive, Astatine carries serious energy. She is intensely radioactive, which makes her both fascinating and a little intimidating. She is aware of this. She tries not to lean into the vibe, but it is hard not to when you literally glow with instability.
Because she is so rare, she has fewer day-to-day responsibilities than the rest of her halogen family. She watches Chlorine and Bromine make dramatic entrances while she takes careful notes from the sidelines.
Astatine’s favorite hobby is existing briefly and making people wonder what she was thinking. The answer is usually: “I would tell you, but I am already gone.”