Iridium is a chemical element; it has symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, it is considered the second-densest naturally occurring metal (after osmium) with a density of 22.56 g/cm 3 (0.815 lb/cu in) as defined by experimental X-ray crystallography.

Jan 31, 2025 · Iridium, chemical element, one of the platinum metals of Groups 8–10 (VIIIb), Periods 5 and 6, of the periodic table. It is very dense and rare and is used in platinum alloys. A precious, silver-white metal, iridium is hard and brittle, but it …

Element Iridium (Ir), Group 9, Atomic Number 77, d-block, Mass 192.217. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Iridium is a chemical element with symbol Ir and atomic number 77. Classified as a transition metal, Iridium is a solid at room temperature.

Iridium (pronounced as i-RID-ee-em) is a hard and brittle metal represented by the chemical symbol Ir. It is the least reactive element, belonging to the platinum family. It has 34 isotopes with mass numbers ranging from 165 to 198 of which only Ir-191 and Ir-193 exist naturally with a stable half-life [1, 2] .

Name: iridium; Symbol: Ir; Atomic number: 77 ; Relative atomic mass (A r): 192.217 (3) Standard state: solid at 298 K; Appearance: silvery white; Classification: Metallic

Iridium is the 77th element in the periodic table and has a symbol of Ir and atomic number of 77. It has an atomic weight of 192.217 and a mass number of 193. Iridium has seventy-seven protons and one hundred sixteen neutrons in its nucleus, and seventy-seven electrons in six shells.

Iridium atom is a cobalt group element atom and a platinum group metal atom. Iridium is an element with atomic symbol Ir, atomic number 77, and atomic weight 192.217. Iridium is a mineral with formula of Ir. The corresponding IMA (International Mineralogical Association) number is IMA1991 s.p.. The IMA symbol is Ir. View More... See also: ...

Sep 7, 2024 · Iridium is a dense, hard, and corrosion-resistant metal belonging to the platinum group metals (PGMs). It has the element symbol Ir and atomic number 77. Iridium is one of the rarest elements on Earth. Its remarkable resistance to heat and chemical attack makes it valuable in various high-temperature and corrosive applications.

Oct 8, 2024 · Iridium (chemical symbol Ir, atomic number 77) is one of the most remarkable and resilient metals on Earth. Known for its incredible resistance to heat and corrosion, it holds the distinction of being one of the most durable and rare elements in the periodic table.