![]() Often, a smaller spread suggests higher liquidity, meaning more buyers and sellers in the market are willing to negotiate. The bid-ask spread can indicate a stock’s liquidity, which is how easy it is to buy and sell in the marketplace. The data displayed in the quote bar updates every 3 seconds allowing you to monitor prices in real-time. The bid size displays the total amount of desired shares to buy at that price, and the ask size is the number of shares offered for sale at that price. The numbers next to the bid/ask are the “ size”. ![]() amount that a seller is currently willing to sell. The bid is the highest amount that a buyer is currently willing to pay, whereas the ask is the lowest Super-strong jewelry is also made of an iridium and platinum alloy.The bid & ask refers to the price that an investor is willing to buy or sell a stock. A compound of osmium and iridium, called osmiridium, is used in fountain pen tips and compass bearings. It is also used on some optical lenses to reduce glare. It is also used to make devices needed for high temperatures and in electrical contacts. Iridium's principal use is to harden platinum by making a platinum alloy. Though brittle, iridium can be worked if heated to a white heat of 2,200 to 2,700 degrees Fahrenheit (1,200 to 1,500 degrees Celsius), according to Encyclopedia Britannica. "They speculated that it was caused by a meteor and linked this to the extinction of dinosaurs 66 million years prior," explained Simson. In 1980 scientist Luis Alvarez and his son Water Alvarez found significant amounts of iridium in a certain part of the Earth's crust, spread out all over the Earth's surface. It is so dense that it mainly exists in the Earth's core, rather than crust," said Amanda Simson, an assistant professor of chemical engineering at the University of New Haven.īut some iridium exists in the crust. "Iridium is one of the densest and rarest of Earth's natural elements. Pure iridium is so rare on the Earth's crust that there is only about 2 parts per billion located in the crust, according to Chemistry Explained. Ore containing iridium is found in Brazil, the United States, Myanmar, South Africa, Russia and Australia. Today, iridium is commercially recovered as a byproduct of copper or nickel mining. However, the international prototype kilogram, which defines a kilogram, also made of a platinum and platinum-iridium alloy, is still in use around the world. The meter was redefined in terms of the orange-red spectral line of krypton. This bar was replaced as the definition of a meter in 1960, though. Though the metal itself isn't rainbow colored, it is called this because of its multi-colored compounds.īecause iridium is very resistant to corrosion, the standard meter bar was made of 90 percent platinum and 10 percent iridium. The name iridium comes from the Latin word iris, which means rainbow. At the Royal Institution in London he announced his findings and named one element iridium and the other osmium. After this treatment, the residue separated into two new elements. Tennant discovered iridium by dissolving crude platinum in diluted aqua regia (a mixture of nitric and hydrochloric acids), then by treating the black residue left behind in turn with alkalis and acids, according to the Royal Society of Chemistry.
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