Iridium - Wikipedia
网页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) [8] as defined by experimental X-ray crystallography.
Iridium - Element information, properties and uses | Periodic Table
网页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 | Definition, Properties, & Uses | Britannica
网页2024年9月28日 · 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 becomes ductile and can be worked at a white heat.
Iridium (Ir) - Periodic Table
网页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 - Periodic Table
网页Iridium - Properties, history, name origin, facts, applications, isotopes, electronic configuation, crystal structure, hazards and more; Interactive periodic table of the chemical elements.
Iridium - 77 Ir: the essentials - WebElements
网页Atomic number: 77. Relative atomic mass (Ar): 192.217 (3) Standard state: solid at 298 K. Appearance: silvery white. Classification: Metallic. Group in periodic table: 9. Group name: Precious metal or Platinum group metal. Period in periodic table: 6. Block in periodic table: d. Shell structure: 2.8.18.32.15.2. CAS Registry: 7439-88-5.
Iridium Facts - Periodic Table of the Elements - ThoughtCo
网页2020年1月10日 · Atomic Number: 77; Symbol: Ir; Atomic Weight: 192.22; Discovery: S.Tenant, A.F.Fourcory, L.N.Vauquelin, H.V.Collet-Descoltils 1803/1804 (England/France) Electron Configuration: [Xe] 6s 2 4f 14 5d 7; Word Origin: Latin iris rainbow, because the salts of iridium are highly colored; Element Classification: Transition Metal
Iridium - The Chemical Elements
网页2020年4月8日 · Iridium is a chemical element with atomic number 77 in the periodic table. In Earth’s crust, this precious metal occurs in scarce amounts. As a member of the platinum family of periodic table elements, iridium is characterized by a high density and hardness.
Iridium (Ir) [77] — Chemical Element — Periodic Table
网页Get the facts about element Iridium (Ir) [77] from the periodic table. Find physical data, electron configuration, chemical properties, aggregation states, isotope data (including decay trees) as well as some historic information.
Iridium (Ir) - Atomic Number 77
网页2019年12月30日 · Iridium (Ir) is a heavy white metal that has the atomic number 77 in the periodic table. It is a Transition metal in Group 9. It has the symbol Ir. Iridium was discovered in 1803 by Smithson Tennant in London when he used platinum ores and washed them with hydrochloric and nitric acid.