Indium - ASCII Periodic Table of the Elements

ASCII PERIODIC TABLE OF THE ELEMENTS

  In

Relative atomic mass: 114.818 ± 0.003

English: Indium
French: Indium
Croatian: Indij
German: Indium
Italian: Indio
Spanish: Indio

Atomic number: 49
Group numbers: 13
Period: 5
Standard state (20 °C): solid

Discovery: 1863 Ferdinand Reich, Hieronymus Theodor Richter (DE)

Indium was discovered by Ferdinand Reich and Hieronymus Theodor Richter (DE) in 1863. Named after the 'indicum' (colour indigo), the colour it shows in a spectroscope. It is a rare, very soft, silver-white metal that is stable in air and water but dissolves in acids. Metal can ignite and burn. Indium is found in certain zinc ores. It is used to coat high speed bearings and as an alloy that lowers the melting point of other metals. Relatively small amounts are used in dental items and in electronic semiconductors.

Electronic configuration: [Kr] 4d¹⁰ 5s² 5p¹
Formal oxidation number: +3
Atomic radius: 162.6 pm

Electronegativities: 1.78
Thermal conductivity: 81.6 W/(m K)
Electrical resistivity (20 °C): 8.37 μΩcm

Melting point: 156.6 °C
Boiling point: 2072 °C

Heat of fusion: 3.27 kJ/mol
Heat of vaporization: 231.8 kJ/mol
Heat of atomization: 243.72 kJ/mol