The number of atoms per unit cell in BCC are
Correct answer: A. Two
- A. Two
- B. Four
- C. Six
- D. Nine
Explanation
In a body-centred cubic (BCC) unit cell, there is one atom located at the centre of the cell and eight atoms at the corners of the cube. Each corner atom is shared among eight adjacent unit cells. Therefore, each corner atom contributes 1/8th of an atom to the unit cell, and with eight corners, this adds up to 1 atom. Adding the single atom at the centre, there are a total of 2 atoms per unit cell. Option A is correct. Options B, C, and D are incorrect as they either correspond to other structures (like FCC for option B) or do not align with the BCC atomic distribution.
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