Indium (In): Properties, Uses and Facts in 3D
Indium is element 49 on the periodic table, a post-transition metal. At room temperature it is a solid. Open it in the 3D Periodic Table to spin its tile, see its electron shells and read its story.
Explore in 3DIndium quick facts
| Atomic number | 49 |
|---|---|
| Symbol | In |
| Atomic mass | 114.818 |
| Category | Post-Transition Metal |
| Group and period | Group 13, period 5 |
| Block | p-block |
| State at room temperature | Solid |
| Electron configuration | [Kr] 4d¹⁰ 5s² 5p¹ |
| Electrons per shell | 2, 8, 18, 18, 3 |
| Discovered | 1863, Reich |
What is indium used for?
- Indium tin oxide (ITO) in touchscreens
- Low-melting-point alloys
- Bearings & plating
Interesting facts about indium
- Indium tin oxide is the transparent conductor in most touchscreens and LCDs
- Indium emits a characteristic "tin cry". A high-pitched squeak when bent
- Indium supply is limited because it is mainly a by-product of zinc mining
Indium was discovered in 1863 by Reich in Germany.
Where indium sits on the periodic table
Indium is in group 13, period 5. Tap any element to open its page.
Other post-transition metals
Indium questions
What is the atomic number of indium?
Indium has atomic number 49, so every indium atom has 49 protons in its nucleus. Its symbol is In and its atomic mass is 114.818.
Is indium a metal?
Indium is a metal. On the periodic table it is grouped as a post-transition metal, found in group 13, period 5.
What is the electron configuration of indium?
The electron configuration of indium is [Kr] 4d¹⁰ 5s² 5p¹. Its electrons sit in 5 shells: 2, 8, 18, 18, 3.
What is indium used for?
Indium is used for indium tin oxide (ito) in touchscreens, low-melting-point alloys and bearings & plating.
Who discovered indium?
Indium was discovered in 1863 by Reich in Germany.
The 3D Periodic Table is made by Julian Neagu, a solo founder in London, as part of VisionVix Simulators. It is free to use in the browser on desktop and phone, with no sign-up.