Two substances with crystal structures can be different even if the substances contain the same chemical elements in the same ratio. These substances have the same composition, but they are different because their atoms are arranged in different ways.Select the two models that represent substances with the same chemical formula but different arrangements of atoms.CSngraphite beta tin alpha tin Submit
Question
Two substances with crystal structures can be different even if the substances contain the same chemical elements in the same ratio. These substances have the same composition, but they are different because their atoms are arranged in different ways.Select the two models that represent substances with the same chemical formula but different arrangements of atoms.CSngraphite beta tin alpha tin Submit
Solution
The two models that represent substances with the same chemical formula but different arrangements of atoms are graphite and beta tin.
Here's why:
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Graphite and beta tin both consist of carbon atoms. However, the arrangement of these atoms differs in each substance. In graphite, the carbon atoms are arranged in a hexagonal lattice, while in beta tin, the atoms are arranged in a tetragonal structure.
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Alpha tin, on the other hand, has a diamond cubic structure. This means that even though it is composed of the same type of atoms as beta tin and graphite, its atoms are arranged differently. Therefore, it does not meet the criteria specified in the question.
So, the correct answer is graphite and beta tin.
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