Assertion (A): The total number of atoms present in a simple cubic unit cell is one. Reason (R): Simple cubic unit cell has atoms at its comers, each of which is shared between eight adjacent unit cells.

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Solution

(a) In simple cubic unit cell, only comers are occupied by atoms. Thus, total number of atoms present in the unit cell will be one.

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Similar questions

Q. Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): The total number of atoms present in a simple cubic unit cell is one.
Reason (R): Simple cubic unit cell has atoms at its corners, each of which is shared between eight adjacent unit cells.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.

(a) Assertion and Reason both are correct statements and Reason is correct explanation for Assertion.

(b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion.

(d) Assertion is wrong statement but Reason is correct statement.

Assertion (A) The total number of atoms present in a simple cubic unit cell is one.

Reason (R) Simple cubic unit cell has atoms at its corners, each of which is shared between eight adjacent cells.

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Q. The number of atoms per unit cell in a simple cubic, face-centered cubic and body-centred cubic are ...... respectively.

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