49In114.82
Indium
Post-transition metal · element 49 · group 13, period 5
Quick facts
| Symbol | In |
|---|---|
| Atomic number | 49 |
| Relative atomic mass | 114.82 |
| Category | Post-transition metal |
| Position | group 13, period 5 |
| State at 20 °C | Solid |
| Melting point | 156.6 °C |
| Boiling point | 2,072 °C |
| Density | 7.31 g/cm³ |
| Electronegativity | 1.78 |
| Electron configuration | [Kr] 4d10 5s2 5p1 |
About Indium
Indium has the symbol In and atomic number 49, which means every indium atom has 49 protons in its nucleus and, in a neutral atom, 49 electrons. At room temperature it is a solid.
Post-transition metals are softer metals found to the right of the transition metals, with lower melting points.
It melts at 156.6 °C and boils at 2,072 °C.
Explore it
See where indium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.