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1. Iridium: Iridium is a chemical element with the symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, iridium is considered to be the second-densest naturally occurring metal (after osmium) with a ... (chemical element with atomic number 77) [100%] 2021-12-23 [Iridium] [Chemical elements]...
2. Iridium: Iridium is an element in the transition metals class of the periodic table. It is hard and lustrous, and is perhaps the most corrosion-resistant metal known. [100%] 2023-02-26 [Elements] [Metals]...
3. Iridium: Iridium, one of the metals of the platinum group, discovered in 1802 by Smithson Tennant during the examination of the residue left when platinum ores are dissolved in aqua regia; the element occurs in platinum ores in the form of ... [100%] 2022-09-02
4. Iridium: Iridium is a metallic element. It is a dense, very hard, brittle, silvery-white transition metal of the platinum group. [100%] 2023-01-30
5. Iridium: Iridium is a chemical element with the symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, iridium is considered to be the second-densest metal (after osmium) with a density of ... (Chemistry) [100%] 2023-08-26 [Iridium] [Chemical elements]...
6. Iridium: Iridium (chemical symbol Ir, atomic number 77) is a dense, hard, brittle, silvery-white transition metal of the platinum family. It occurs in natural alloys with platinum or osmium and is notable for being the most corrosion-resistant element known ... [100%] 2023-02-03
7. Iridium: Iridium es el nombre de una constelación de 66 satélites de comunicaciones que giran alrededor de la Tierra en 6 órbitas bajas LEO (Low Earth Orbit), a una altura aproximada de 780 km de la tierra. Cada una de las ... [100%] 2024-06-22
8. Iridium (téléphonie par satellite): Pour les articles homonymes, voir Iridium (homonymie). modifier Iridium est un système de téléphonie par satellite reposant sur une constellation de satellites circulant sur une orbite terrestre basse. (Téléphonie par satellite) [100%] 2025-03-07
9. Isidium: An isidium is a vegetative reproductive structure present in some lichens. Isidia are outgrowths of the thallus surface, and are corticated (i.e., containing the outermost layer of the thallus), usually with a columnar structure, and consisting of both fungal ... (Terminology for morphology of a lichen reproductive structure) [85%] 2024-09-24 [Lichenology] [Fungal morphology and anatomy]...
10. Isotopes of iridium: There are two natural isotopes of iridium (77Ir), and 37 radioisotopes, the most stable radioisotope being Ir with a half-life of 73.83 days, and many nuclear isomers, the most stable of which is Ir with a half-life ... (Physics) [77%] 2023-04-15 [Isotopes of iridium] [Iridium]...
11. Iminium: An iminium salt or cation in organic chemistry has the general structure [RRC=NRR] and is as such a protonated or substituted imine . It is an intermediate in many organic reactions such as the Beckmann rearrangement, Vilsmeier-Haack reaction, Stephen ... [71%] 2023-12-13
12. Iranium: Iranium is a 2011 documentary film by director Alex Traiman, Written and Distributed by Clarion Fund. The film discusses Iranian foreign policy and Iran – United States relations, including the Iran hostage crisis and the 1979 Iranian Revolution and takeover by ... [71%] 2025-01-20 [Documentary films about nuclear war and weapons] [Documentary films about politics]...
13. Ixeridium: Ixeridium is a genus of Asian flowering plants in the family Asteraceae. (Genus of flowering plants) [71%] 2024-12-28 [Cichorieae] [Asteraceae genera]...
14. Iridium trihydride: Iridium trihydride (IrH3) is a chemical compound of iridium and hydrogen that can be formed under high pressure. The crystalline form has a distorted simple cubic structure. (Chemistry) [70%] 2023-05-29 [Iridium compounds] [Hydrides]...
15. Iridium 7: Iridium 7 was a United States Iridium communications satellite. It was launched into low Earth orbit from Vandenberg Air Force Base at 14:55 GMT on 5 May 1997, by a Delta II 7920-10C carrier rocket. (Engineering) [70%] 2022-05-27 [Iridium satellites]
16. Iridium tetroxide: Iridium tetroxide (IrO4, Iridium(VIII) oxide) is a binary compound of oxygen and iridium in oxidation state +8. This compound was formed by photochemical rearrangement of [(η-O2)IrO2] in solid argon at a temperature of 6 K (−267.15 °C ... (Chemistry) [70%] 2022-08-16 [Iridium compounds] [Transition metal oxides]...
17. Iridium acetylacetonate: Iridium acetylacetonate is the iridium coordination complex with the formula Ir(O2C5H7)3, which is sometimes known as Ir(acac)3. The molecule has D3-symmetry. [70%] 2022-12-12 [Iridium compounds] [Acetylacetonate complexes]...
18. Flash Iridium: Pour les articles homonymes, voir Iridium (homonymie). Un flash Iridium (en anglais Iridium flare) est un phénomène lumineux produit par la réflexion de la lumière du Soleil sur l'une des surfaces réfléchissantes (antennes ou parfois panneaux solaires) d'un ... [70%] 2023-09-24
19. Iridium compounds: Iridium compounds are compounds containing the element iridium (Ir). Iridium forms compounds in oxidation states between −3 and +9, but the most common oxidation states are +1, +3, and +4. (Chemistry) [70%] 2023-12-20 [Iridium] [Iridium compounds]...
20. Iridium Communications: Iridium Communications Inc. (formerly Iridium Satellite LLC) is a publicly traded United States company headquartered in McLean, Virginia. (Company) [70%] 2023-12-16 [Satellite telephony] [Satellite Internet access]...