Overview
Astatine is an extremely rare, radioactive halogen produced in minute quantities in nuclear reactions and decays rapidly to other elements.
Properties
Predicted to behave chemically like other halogens with multiple oxidation states, astatines chemistry is challenging to study due to scarcity and radioactivity.
Occurrence and Uses
No significant natural accumulation exists; astatine isotopes are used only in specialized research and have been investigated for targeted alpha therapy in nuclear medicine.
Isotopes and Safety
All astatine isotopes are radioactive with short half lives; work with astatine requires radiological facilities and is confined to specialized laboratories.