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Assertion: In a simple cubic (SC) unit cell, there is only one atom located at the centre of the cube.
Reasoning: The SC unit cell has an atom located at each of the eight corners, and the atoms at the corners are shared by eight unit cells.
Both assertion and reasoning are true, and the reasoning is the correct explanation of the assertion.
Both assertion and reasoning are true, but the reasoning is not the correct explanation of the assertion.
The assertion is true, but the reasoning is false.
Both assertion and reasoning are false.
Answers (1)
In a SC unit cell, there is only one atom located at the centre of the cube. The corner atoms are shared by eight unit cells, resulting in one-eighth of each atom being present in the unit cell. Therefore, the total number of atoms in a SC unit cell is 1. Hence, (a) Both assertion and reasoning are true, and the reasoning is the correct explanation of the assertion is the correct answer to the above question.
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