Scelta multipla
Gold is classified as a pure substance. Which of the following properties best supports this classification?
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1. Intro to General Chemistry
Physical Properties
Scelta multipla
Which of the following is closest to the melting point of platinum?
A
3422 °C
B
1085 °C
C
961 °C
D
1768 °C
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Understand that the melting point of an element is the temperature at which it changes from solid to liquid under standard pressure.
Recall or look up the melting points of the given options and the known melting point of platinum to compare.
Note that platinum is a transition metal known for its high melting point, typically higher than common metals like copper (1085 °C) or gold (961 °C).
Recognize that the melting point of platinum is approximately 1768 °C, which is higher than 1085 °C and 961 °C but lower than 3422 °C (which is closer to tungsten's melting point).
Conclude that among the given options, 1768 °C is the closest to the actual melting point of platinum.
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