In
Indium Symbol (In)
Indium is element 49 of the periodic table. Copy its symbol In and see its atomic weight, electron configuration and physical properties.
What does In mean?
In is the chemical symbol for indium, element number 49 in the periodic table. Indium is a post-transition metal in group 13, period 5. It is a solid at room temperature and was discovered in 1863.
Codes and properties
| Chemical symbol | In |
|---|---|
| Atomic number (Z) | 49 |
| Atomic weight (PubChem) | 114.818 |
| Group / period | 13 / 5 |
| Element category | post-transition metal |
| Electron configuration | [Kr]5s² 4d¹⁰ 5p¹ |
| State at 20 °C | Solid |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 1.78 |
| Melting point | 429.75 K (156.60 °C) |
| Boiling point | 2345 K (2071.85 °C) |
| Density | 7.31 g/cm³ |
| Discovered | 1863 |
How to type In
- Plain text: type
In— element symbols are ordinary Latin letters, with the first letter capitalised and the second lowercase. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as H₂O — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{In}in math mode, or use the mhchem package:\ce{In}. - HTML:
In; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for indium?
The chemical symbol for indium is In.
What is the atomic number of indium?
Indium has atomic number 49, meaning each atom has 49 protons.
What is the electron configuration of indium?
The ground-state electron configuration of indium is [Kr]5s² 4d¹⁰ 5p¹.
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Reference: Indium on PubChem (NIH)