Indium (In) — Element Properties, Uses & Facts
Overview
Indium is a chemical element with symbol In and atomic number 49. It is a post-transition metallic element that is rare in Earth's crust. The metal is very soft, malleable and easily fusible, with a melting point higher than sodium, but lower than lithium or tin.
Electron configuration
The electron configuration of Indium is [Kr] 4d10 5s2 5p1, with electron shells of 2, 8, 18, 18, 3.
Physical and chemical properties
Indium is classified as a transition metal. It has an atomic mass of 114.818 and exists as a solid at standard conditions, appearing as silvery lustrous gray.
Real-world uses of Indium
As a transition metal, Indium is typically used in alloys, industrial manufacturing, electronics, or as a catalyst in chemical reactions.
Interesting facts about Indium
- Indium has the atomic number 49 and chemical symbol In.
- It belongs to period 5, group 13 of the periodic table.
- Indium was discovered by Ferdinand Reich.
Explore Indium interactively
Want to compare Indium with other elements or see it highlighted on the full table? Open the interactive periodic table and click on In to explore properties, trends, and neighboring elements. You can also test your knowledge with our periodic table quiz game.
What is Indium used for?
As a transition metal, Indium is typically used in alloys, industrial manufacturing, electronics, or as a catalyst in chemical reactions.
What is the atomic number of Indium?
The atomic number of Indium is 49, meaning it has 49 protons in its nucleus.
What is the electron configuration of Indium?
The electron configuration of Indium is [Kr] 4d10 5s2 5p1.
Is Indium a metal, nonmetal, or metalloid?
Indium is classified as a transition metal.