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建立人际资源圈Platinum
2013-11-13 来源: 类别: 更多范文
Platinum
Platinum is a relatively rare, chemically inert, metallic element. It symbol
is Pt, atomic number is 78, and its atomic weight is 195.09. Platinum is one
of the heaviest substances known. One cubic foot of Platinum weighs 21 times
as much as a cubic foot of water. A grayish-white metal, Platinum has a melting
point of 1772 degrees C and a realatively high boiling point of 3827 degrees
C. It has a high fusing point, is ductile and malleable, expands slightly
upon heating, and has high electrical
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