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Which phrase describes two forms of solid carbon, diamond and graphite, at STP?

(1) the same crystal structure and the same properties
(2) the same crystal structure and different properties
(3) different crystal structures and the same properties
(4) different crystal structures and different properties

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MissPhiladelphia
I think the correct answer from the choices listed above is option 4. The phrase that would describe two forms of solid carbon, diamond and graphite, at STP is that they have different crystal structures and different properties. They are allotropes of carbon. They have the same chemical composition, but they are as different as could be.

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