Germanium is similar to silicon but is made up of a mixture of copper, iron, and germanium sulfides. Read about its commercial applications.

Dr. Kazuhiko Asai presents his findings about the use of organic germanium as a nutrient for humans.

Features a photograph of the radioactive element that was discovered in 1898. Polonium is used as an alpha-particle source for scientific use.

Read a definition of this radioactive element first discovered by Marie Curie.

Provides a photograph of silvery-white tellurium and describes the element's use as an alloying agent and in the rubber industry.

Summary of this element's properties and practical applications is accompanied by details on its geographic distribution.