Overview
Radium is a highly radioactive alkaline earth metal discovered in uranium ores and historically used for luminous applications and medical therapies.
Properties
It behaves chemically like other group 2 metals, forms +2 cations and emits alpha, beta and gamma radiation depending on isotope.
Occurrence and Uses
Once used in luminous paints and cancer treatments, radiums use is now limited to specialized industrial and research roles due to radiological hazards.
Isotopes and Safety
Radium 226 is the most notable isotope with long half life and radiotoxicity; legacy contamination and waste require strict remediation and regulatory oversight.