Indium Element in Periodic Table | Atomic Number Atomic Mass

Indium Element:

Indium is a soft silvery-white metal. It is in the 13th group and 5th period of the periodic table. It is one of the post-transition metals in the group that makes up 0.21 parts per million of the Earth's crust. Its atomic number is 49 and symbol is In. It is relatively rare in the earth and it is generally found in ores of zinc. It contains 39 isotopes but only two naturally occurring isotopes of indium exist, ¹¹³indium and ¹¹⁵indium. ¹¹³indium is a stable isotope and ¹¹⁵indium has a half-life of 4.41×10¹⁴ years.

Uses Of Indium Element:

• Indium is used to make low melting point metal alloys such as solders.
• It is used in the production of transparent conductive coatings of indium tin oxide (ITO) on glass.
• It is also used in the semiconductor industry.
• Because of its low melting points it is used for fire-sprinkler systems in shops and warehouses.

Indium Element Information:   

Discovery year:1863

Discovered by: Ferdinand Reich and Hieronymous Theodor Richter

Atomic number: 49

Relative atomic mass: 114.818 

Electron configuration: [Kr] 4d¹⁰ 5s² 5p¹

Block: p-block

Other elements in the same block:

Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Gallium, Germanium, Arsenic, Selenium, Bromine, Krypton, Tin, Antimony, Tellurium, Iodine, Xenon, Thallium, Lead, Bismuth, Polonium, Astatine, Radon, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine and Oganesson are the same block elements.

Period: period 5

Other elements in the same period:

Rubidium, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Tin, Antimony, Tellurium, Iodine and Xenon are the elements in the same period.

Group: group 13 (boron group)

Other elements in the same group:

Boron, Aluminium, Gallium, Thallium and Nihonium are the same group elements.

Other elements in the same orbital:

Tin, Antimony, Tellurium, Iodine and Xenon are the elements in the same orbital.

Allotropes: none

Key isotopes: ¹¹⁵In 

Melting point: 156.60°C, 313.88°F, 429.75 K

Boiling point: 2027°C, 3681°F, 2300 K

Element category:  post-transition metal

Density (g cm⁻³): 7.31

CAS number: 7440-74-6

Color: silvery lustrous gray

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