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23 hours ago · 2 O) by a sequence of reactions with sodium hydroxide and hydrochloric acid. He named iridium after Iris (Ἶρις), the Greek winged goddess of the rainbow and the messenger of the Olympian gods, because many of the salts he obtained were strongly colored.
- Iridium (Disambiguation)
Iridium is a chemical element with symbol Ir and atomic...
- Smithson Tennant
The blue plaque for Smithson Tennant in Finkle Street,...
- Eltanin Impact
The possible impact site is located at the edge of the...
- Cretaceous–Paleogene Boundary
Badlands near Drumheller, Alberta, Canada, where glacial and...
- Iridium (Disambiguation)
23 hours ago · Hassium is a synthetic chemical element; it has symbol Hs and atomic number 108. Hassium is highly radioactive: its most stable known isotopes have half-lives of approximately ten seconds.
- 108
- group 8
- [269] (data not decisive)
23 hours ago · Seaborgium is a synthetic chemical element; it has symbol Sg and atomic number 106. It is named after the American nuclear chemist Glenn T. Seaborg.As a synthetic element, it can be created in a laboratory but is not found in nature.
- 106
- group 6
- [269]
23 hours ago · Airplanes emit gases (carbon dioxide, water vapor, nitrogen oxides or carbon monoxide − bonding with oxygen to become CO 2 upon release) and atmospheric particulates (incompletely burned hydrocarbons, sulfur oxides, black carbon), interacting among themselves and with the atmosphere.
23 hours ago · Charleston is the capital and most populous city of the U.S. state of West Virginia and the seat of Kanawha County. Located at the confluence of the Elk and Kanawha rivers, the city had a population of 48,864 at the 2020 census and an estimated population of 48,018 in 2021.
- 597 ft (182 m)
- Kanawha
23 hours ago · Human food is food which is fit for human consumption, and which humans willingly eat.Food is a basic necessity of life, and humans typically seek food out as an instinctual response to hunger; however, not all things that are edible constitute as human food.
23 hours ago · The economy of Saudi Arabia is the second-largest in the Middle East and the nineteenth-largest in the world. The Saudi economy is highly reliant on its petroleum sector.Oil accounts on average in recent years for approximately 40% of Saudi GDP and 75% of fiscal revenue, with substantial fluctuations depending on oil prices each year.
