One of the most important uses of samarium is in the manufacture of very powerful magnets. Samarium is combined with the metal cobalt to make samarium-cobalt, or SmCo, magnets. They are among the strongest magnets known. They also have other desirable properties.

Why is francium so important?

Francium has been used in the field of research, chemistry and also in the atomic structure. It is used for diagnostics for curing cancers. It is also used in many spectroscopic experiments. Francium is a highly radioactive metal, and since it exhibits a short half-life, it does not have more impact on the environment.

What is an interesting fact about samarium?

Samarium is a yellowish silver-colored metal. It is the hardest and the most brittle of the rare earth elements. It tarnishes in air and will ignite in air at about 150 °C. Under ordinary conditions, the metal has rhombohedral crystals.