Atomic Number of Iridium

Iridium Atomic Number

Atomic Number of Iridium is 77.

Chemical symbol for Iridium is Ir. Number of protons in Iridium is 77. Atomic weight of Iridium is 192.217 u or g/mol. Melting point of Iridium is 2410 °C and its the boiling point is 4130 °C.

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

About Iridium

Iridium is a rare and hard transition metal discovered at the beginning of the 19th century and named after the Greek goddess of rainbow, Iris. This metal is not reactive and has quite high density. It produces salts of various bright colors. It has no importance to the living organisms and in very small amounts can be extracted from its chemical compounds, mainly with nickel. It was also discovered that asteroids and meteors are quite rich in iridium. This chemical element is known as the most corrosion resistive metal. Its applications are not numerous; this chemical element is used in alloys with other metals in producing spark plugs, compass bearings, special meter bars, etc.

Properties of Iridium Element

Atomic Number (Z)77
Atomic SymbolIr
Atomic Weight192.217 u
Density22.56 g/cm3
Melting Point (K)2719 K
Melting Point (℃)2410 °C
Boiling Point (K)4701 K
Boiling Point (℃)4130 °C
Heat Capacity0.131 J/g · K
Abundance0.001 mg/kg
State at STPSolid
DescriptionTransition metal
Electronegativity (Pauling) χ2.2
Ionization Energy (eV)8.967
Atomic Radius135pm
Covalent Radius137pm
Valence Electrons2
Year of Discovery1803
DiscovererTenant and andere

What is the Boiling Point of Iridium?

Iridium boiling point is 4130 °C. Boiling point of Iridium in Kelvin is 4701 K.

What is the Melting Point of Iridium?

Iridium melting point is 2410 °C. Melting point of Iridium in Kelvin is 2719 K.

How Abundant is Iridium?

Abundant value of Iridium is 0.001 mg/kg.

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

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

When was Iridium Discovered?

Iridium was discovered in 1803.