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In 1959–1961 Great Britain Atomic Energy Authority produced 125 g of 99.9% pure protactinium at a cost of $ 500 000, giving the cost of 4 000 000 USD per kg. [44] Periodic Table of Elements at Los Alamos National Laboratory website at one point listed protactinium-231 as available from Oak Ridge National Laboratory at a price of 280 000 USD/kg.
Cost: $53.37 per gram. Iridium is a hard, silvery metal that is one of the rarest in the world. ... Cost: $100,000 per kilogram. ... it requires several hundred million pounds just to create one ...
2 gas for each 1 kilogram (2.2 lb) of iridium. ... An alloy of 90% platinum and 10% iridium was used ... there are only about 20 parts per trillion of iridium ...
The international prototype of the kilogram (IPK) is an artifact standard of platinum–iridium alloy that was defined as having a mass of exactly one kilogram. Platinum–iridium alloys are alloys of the platinum group precious metals platinum and iridium. Typical alloy proportions are 90:10 or 70:30 (Pt:Ir).
The only three verifications occurred in 1889, 1948, and 1989. For instance, the US owns five 90% platinum / 10% iridium (Pt‑10Ir) kilogram standards, two of which, K4 and K20, are from the original batch of 40 replicas distributed in 1884. [Note 4] The K20 prototype was designated as the primary national standard of mass for the US. Both of ...
Foot Locker, Inc (NYSE:FL) stock tumbled in the premarket session on Tuesday. The company reported a third-quarter adjusted EPS of $0.33, missing the analyst consensus estimate of $0.41. Quarterly ...
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Although any cut of beef can be used to produce ground beef, chuck steak is a popular choice because of its rich flavor and meat-to-fat ratio. Round steak is also often used. In the United States, ground beef is usually categorized based on the cut and fat percentage: [6] Chuck: 78–84% lean; Round: 85–89% lean; Sirloin: 90–95% lean