Radium

What is Radium?

Radium is a special kind of chemical element with the symbol Ra. It has the atomic number 88, which means it is made of 88 tiny parts called atoms. Radium belongs to a group called the alkaline earth metals. It looks silvery-white but can change when it touches air.

Radium gives off invisible energy called ionizing radiation. This makes some materials glow in the dark, like old watches and clocks.

How Was Radium Discovered?

Radium was discovered in 1898 by Marie and Pierre Curie. They found it while studying materials from a mine in Jáchymov. They took a substance called uraninite and found radium hidden inside. In 1910, they separated the pure metal using a process called electrolysis.

Where is Radium Found?

Radium occurs naturally but only in very tiny amounts. It is mostly found with uranium ores. These ores are rocks that contain uranium. Radium is made when bigger elements break apart over time.

Fun Facts About Radium

• Radium was once used to make glow-in-the-dark paints for watches and clocks.
• It was also sold as a health treatment, but we now know it can be harmful.
• Today, radium is only used in some special medical treatments.
• Radium looks most like barium, another metal in the same group.

Radium is a fascinating element that helps scientists learn new things about our world!