Palladium Facts

Palladium Facts
Palladium (Pd) has an atomic number of forty-six. This rare, steely-colored metal has the lowest melting point of any of the elements in the platinum group metals.
Interesting Palladium Facts:
Palladium was discovered in 1802 by William Hyde Wollaston.
The discovery was surrounded in controversy, with other scientists claiming palladium was simply a platinum alloy and not a new element.
Wollaston offered several anonymous offers for anyone who could isolate palladium.
Palladium's discovery was therefore credited to Richard Chenevix in 1803.
Wollaston discovered rhodium in 1804 and admitted in 1805 that he had also discovered palladium.
Palladium is a member of the platinum group metals, with five other elements.
Palladium is the least dense of any of the platinum group metals.
There are seven natural isotopes of palladium.
Six of those isotopes are stable.
There are twenty-one radioactive isotopes of palladium.
Palladium does not tarnish under normal conditions because it does not react with oxygen.
In order to tarnish by forming a coating of palladium oxide, it must be heated to at least 800 degrees Celsius.
Palladium is found naturally alloyed with gold or other PGMs.
Palladium is also found in the minerals polarite and copperite.
Russia and South Africa are the leading producers of palladium, each producing around 40% of the world's supply annually.
More than half of all palladium consumed annually goes into automobile catalytic converters.
Because it is found in catalytic converters, palladium can be recycled from those parts.
Palladium can also be recovered as a nuclear waste product from spent fuel rods.
Because of its easy diffusing of hydrogen when heated, palladium is still used to refine hydrogen gas.
At one time, palladium was used as an early treatment for tuberculosis, but its harmful side effects led to better treatment alternatives.
In certain amounts, palladium is prone to spontaneously igniting in air.

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