Skip links

Indium (In): Fun Facts and Information About the Element


What is the symbol? In
What is the atomic number? 49
What is the atomic weight? 114.818
What is the melting point in Celsius? 157
What is the boiling point in Celsius? 2000
What is the density (g/cm3)? 7.31
What year was it discovered? 1863
Who discovered the element? “Ferdinand Reich
Hieronymus Theodor Richter”
What group is the element in? 13
What is the electron configuration? [Kr] 4d10 5s2 5p1
What is the ionization energy? 5.7864
What element category is it in? Other Metals

Where is Indium Found?

Indium is associated with zinc materials, and where most commercial indium is now obtained. It can also be found in iron, lead, and copper ores.

What is Indium Used For?

It is used in making bearing alloys, germanium transistors, rectifiers, thermistors, and photoconductors. It can be plated onto metal and evaporated onto glass, forming a mirror as good as that made with silver but with more resistance to atmospheric corrosion.