It's iridium with a density of 22.650 grams, compare that to lead which is 11.342.
2006-09-26 12:14:16
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answer #1
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answered by sluggo1947 4
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Osmium and Iridium are the two most dense elements in pure form. They are also very pretty metals, iridium particularly. Unlike osmium, iridium does not tarnish in air, and is in fact impervious to many forms of chemical attack, much like platinum. An alloy of 90% platinum and 10% iridium is widely used in both the jewelry and chemical industries, because it is strong, hard, beautiful, and impervious to almost all chemicals even at very high temperatures.
Which is the most dense element, osmium or iridium? That honor has changed hands a couple of times over the years. How, you might ask? Because measuring the density of a pure element isn't nearly as straightforward as you might think. For one thing, it can be different for different crystalline forms (allotropes) of the same element. For example, diamond is much denser than graphite: Which is the true density of carbon? Both. In the case of metals, it may be impossible to grow single crystals, so you're measuring the density of a polycrystalline mixture, and the density may depend on details of how the material cooled. Minute impurities can also have a big impact on the density.
So, as measurements and purities were refined over the years, the current best values of osmium and iridium kept changing, and that's how they traded places as most dense of all. I solved this dilemma by only having room to engrave three decimals places of the density, and to three decimal places their density is identical, so I didn't have to pick sides.
2006-09-26 12:04:54
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answer #2
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answered by DanE 7
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Okay, not really answering the original question (sounds like you have it!)
Have to respond to summit - Women aren't dense - men (like you, not all of them!) have no substance!
2006-09-26 12:12:59
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answer #5
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answered by tigglys 6
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