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Information valid for In-115 unless otherwise noted

Basic Information

Symbol: In
Atomic Number: 49
Mass: 114.818
Melting Point: 156.61 C
Boiling Point: 2000.0 C
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

[Bohr Model of Indium]
Number of Energy Levels: 5

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 18
    Fifth Energy Level: 3


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


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