Elements
49

In

Indium

Indium (In) is a silver-white metal that has the atomic number 49 in the periodic table. It is located in Group 13 of the periodic table. It has the symbol In.

Indium is classed as an ‘other’ metal. Like Gallium it exists in a state of a liquid over a wide range of temperatures due to its low melting point and high boiling point. It is used in the production of gallium alloys with low melting points and also used in the production of semiconductors. Indium is found in zinc minerals in the earths crust. It was discovered in 1863 by Ferdinand Reich upon examining zinc sulfide ores he isolated Indium. After careful spectrum analysis he discovered a bright indigo line. It is located in Group 13 as a metal. It has a melting point of 156°c and a boiling point of 2070°c.

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FAQ's

What is the Melting Point for Indium?

Indium has a Melting Point of 156.61°F, meaning at 156.61°F it will turn to a liquid.

What is the Boiling Point for Indium?

Indium has a Boiling Point of 2080°F, meaning at 2080°F it will turn to a Gas.

What is the Electronegativity of Indium?

Indium's Electronegativty is 1.78. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Indium?

Indium has a Heat of Vaporization of 231.5 kJ/mol.

Uses

Used to coat high speed bearings and as an alloy that lowers the melting point of other metals. Relativly small amounts are used in dental items and in electronic semiconductors.

Sources

Found in certain zinc ores.

49
Protons
49
Electrons
66
Neutrons

In

Element Symbol
In
Atomic Weight
114.818
Atomic Number
49
State
Solid
Melting Point
Unknown
156.61
°C
Boiling Point
2080
Unknown
°C
Heat of Vaporization
231.5
Unknown
kJ/mol
Crystal Structure
Tetragonal
Thermoconductivity
0.816
Unknown
W/cmK
Shells
2,8,18,18,3
Group
Post-Transition Metal
Period
5
Block
P Block
Orbitals
[Kr] 4d10 5s2 5p1
Coefficient of Thermal Expansion
32.1 10^-6 K^-1
Covalent Radius
1.44 Å
Density at 293K
7.31 g/cm³
Electrical Conductivity
0.116 10^6/cm ohm
First Ionization Potential
5.7864 V
Second Ionization Potential
18.869 V
Third Ionization Potential
28.03 V
Ionic Radius
.80 (+3) Å
Oxydation States
3
Lattice Parameter
4.5981 Å
Lattice Parameter 2
--
Lattice Parameter 3
5.9270 Å
Pronounced

IN-di-em

Discovered by

Ferdinand Reich, T. Richter

Discovery date

1863

Orbital configuration
2,8,18,18,3

Download the Periodic Table

Explore Other Post-Transition Metals

26.982
13

Al

Aluminium
204.38
81

Tl

Thallium
69.723
31

Ga

Gallium
118.71
50

Sn

Tin
208.98
83

Bi

Bismuth
209
84

Po

Polonium
207.2
82

Pb

Lead
The post-transition metals are the ones found between the transition metals (to the left) and the metalloids (to the right). They include aluminium (Al), gallium (Ga), indium (In), thallium (Tl), tin (Sn), lead (Pb) and bismuth (Bi).
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