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Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars. ... there has been interest in converting base metals to gold ... Potassium: 0.862 ...
Potassium is a chemical element; it has symbol K (from Neo-Latin kalium) and atomic number 19. It is a silvery white metal that is soft enough to easily cut with a knife. [9] Potassium metal reacts rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of exposure.
Metal prices are the prices of metal as a commodity that are traded in bulk at a predefined purity or grade. Metal can be split into three major categories, precious metals, industrial metals and other metals. Precious metals and industrial metals are priced by trading of those metals on commodities exchanges. [1]
The abundance of elements in Earth's crust is shown in tabulated form with the estimated crustal abundance for each chemical element shown as mg/kg, or parts per million (ppm) by mass (10,000 ppm = 1%).
For reference, prices in November 2011 were about US$470 per tonne, ... by the chloralkali industry to produce potassium hydroxide, in metal electroplating, ...
Because of the low availability relative to demand, rhenium is among the most expensive industrial metals, with an average price exceeding US$6,000 per kilogram, as of mid-2009. It first traded in 1928 at US$10,000 per kilogram of metal, but traded at US$250 per Troy ounce in mid-2010. [82] It traded in July 2010, at about US$4,000–4,500/kg. [83]
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A 70 kg human body contains about 140 g of potassium, hence about 140g × 0.0117% ≈ 16.4 mg of 40 K; [7] whose decay produces about 3850 [8] to 4300 disintegrations per second continuously throughout the life of an adult person (and proportionally less in young children). [Note 3] [9]