Platinum
Beginning of paper
, symbol Pt, is a relatively rare, chemically inert metallic
element that is more expensive than gold. The atomic number of is
78. is one of the transition elements in group 10 of the periodic
table. is the most important of the group of elements called the
metals, also included in this group ....
Middle of paper
.... call it white gold.
Native platinum contains from 60 to 85 percent pure platinum. The small,
irregular grains that contain the ore also contain other rare metals, such
as iridium, osmium, palladium, rhodium, and ruthenium. The grains also
contain small amounts of iron, copper, chromium, and titanium. A large
nugget of platinum will be found only on occasion, like in 1843, a lump
weighing over 21 pounds was found in Russia. Russia produces the worlds
largest share of platinum-group meta ....
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