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Basic Information

Name: Indium
Symbol: In
Atomic Number: 49
Atomic Mass: 114.818 amu
Melting Point: 156.61 °C (429.76 K, 313.898 °F)
Boiling Point: 2000.0 °C (2273.15 K, 3632.0 °F)
Number of Protons/Electrons: 49
Number of Neutrons: 66
Classification: Other Metals
Crystal Structure: Tetragonal
Density @ 293 K: 7.31 g/cm³
Color: Silverish

Atomic Structure

Number of Energy Levels: 5

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Isotopes

Isotope	Half Life
In-111	2.8 days
In-113	Stable
In-113m	1.7 hours
In-114	1.2 minutes
In-114m	49.5 days
In-115	4.4E14 years
In-115m	4.5 hours
In-116	14.1 seconds
In-116m	54.2 minutes
In-117	44.0 minutes
In-117m	1.9 hours

Facts

Date of Discovery: 1863
Discoverer: Ferdinand Reich
Name Origin: From the Indigo color seen in its spectrum
Uses: coating of high-speed bearings
Obtained From: by-product of zinc refining

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