Atomic NumberAtomic Number of Iridium
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 YearAbout 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 Symbol | Ir |
| Group | 9 |
| Period | 6 |
| Atomic Weight | 192.217 u |
| Density | 22.56 g/cm3 |
| Melting Point (K) | 2719 K |
| Melting Point (℃) | 2410 °C |
| Boiling Point (K) | 4701 K |
| Boiling Point (℃) | 4130 °C |
| Heat Capacity | 0.131 J/g · K |
| Abundance | 0.001 mg/kg |
| State at STP | Solid |
| Occurrence | Primordial |
| Description | Transition metal |
| Electronegativity (Pauling) χ | 2.2 |
| Ionization Energy (eV) | 8.967 |
| Atomic Radius | 135pm |
| Covalent Radius | 137pm |
| Valence Electrons | 2 |
| Year of Discovery | 1803 |
| Discoverer | Tenant and andere |