49
In
Indium
Indium
Indium (In)
Post-transition Metals · Solid · Period 5 · Group 13
Element Properties
- Atomic Number
- 49
- Symbol
- In
- Atomic Mass
- 114.818
- Category
- Post-transition Metals
- Standard State
- Solid
- Period
- 5
- Group
- 13
- Electronegativity
- 1.78
- Atomic Radius
- 193
- Ionization Energy
- 5.79
- Electron Affinity
- 0.3
- Oxidation States
- +3
- Melting Point
- 429.75 K (156.6 °C)
- Boiling Point
- 2345 K (2071.85 °C)
- Density
- 7.31
- Electron Configuration
- [Kr]5s2 4d10 5p1
- Year Discovered
- 1863
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Frequently asked questions
What is the atomic number of Indium?
The atomic number of Indium is 49, which equals the number of protons in its nucleus.
What is the atomic mass of Indium?
The atomic mass of Indium is approximately 114.818 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Indium?
The electron configuration of Indium is [Kr]5s2 4d10 5p1.
Where is Indium in the periodic table?
Indium is located in period 5, group 13.
When was Indium discovered?
Indium was discovered in 1863.
Related elements
Same group
5
B
Boron
10.81
13
Al
Aluminum
26.982
31
Ga
Gallium
69.723
81
Tl
Thallium
204.383
113
Nh
Nihonium
286.182