Atomic Number of Indium

Indium Atomic Number

Atomic Number of Indium is 49.

Chemical symbol for Indium is In. Number of protons in Indium is 49. Atomic weight of Indium is 114.818 u or g/mol. Melting point of Indium is 156,2 °C and its the boiling point is 2080 °C.

» Boiling Point » Melting Point » Abundant » State at STP » Discovery Year

About Indium

Indium is a soft light blue and silver color metal, with chemical properties similar to the ones of gallium or sodium. Uncombined indium almost does not exist on our planet, but it is possible to obtain it from minerals and natural ores. The name of this chemical element is derived from the Latin word meaning indigo. This chemical element has no biological importance and can be even dangerous to living creatures, even in very small doses. Indium creates a number of compounds like oxidants and other organic compounds. Indium is used in alloys and for producing a large numbers of goods like solar panels, LED and touch screens, etc. Combined with other chemical elements, indium is used in thermometers, diodes, dental amalgam, transistors, microchips, and so on.

Uses of Indium

Indium, a silvery lustrous gray element with the symbol In, is used as coating bearings in aircraft engines, in cryogenics, as well as in ultra-high-vacuum applications. Indium compounds are employed as semiconductors. Indium tin oxide (ITO) is used in flat-panel displays, polymer-based electronics, smart windows, glass doors of supermarket freezers, Kodak DCS cameras, antireflection coatings, thin-film photovoltaics, and architectural windows. Indium(III) oxide (In2O3) is used in batteries, optical coatings, etc. This alloy can be also used in histology too. The applications of indium antimonide detectors are Spectrometry, Radiometers, Thermal Imaging, and Heat-Seeking Guidance. Indium gallium nitride is employed in modern blue and green LEDs.

Compounds with Indium

Properties of Indium Element

Atomic Number (Z)49
Atomic SymbolIn
Atomic Weight114.818 u
Density7.31 g/cm3
Melting Point (K)429.75 K
Melting Point (℃)156,2 °C
Boiling Point (K)2345 K
Boiling Point (℃)2080 °C
Heat Capacity0.233 J/g · K
Abundance0.25 mg/kg
State at STPSolid
Electronegativity (Pauling) χ1.78
Ionization Energy (eV)5.78636
Atomic Radius155pm
Covalent Radius144pm
Van der Waals Radius193
Valence Electrons3
Year of Discovery1863
DiscovererReich and Richter

What is the Boiling Point of Indium?

Indium boiling point is 2080 °C. Boiling point of Indium in Kelvin is 2345 K.

What is the Melting Point of Indium?

Indium melting point is 156,2 °C. Melting point of Indium in Kelvin is 429.75 K.

How Abundant is Indium?

Abundant value of Indium is 0.25 mg/kg.

What is the State of Indium at Standard Temperature and Pressure (STP)?

State of Indium is Solid at standard temperature and pressure at 0℃ and one atmosphere pressure.

When was Indium Discovered?

Indium was discovered in 1863.