A cell with one extra particle at its centre is called:
AEdge-centred
BBody-centred
CFace-centred
DEnd-centred
Answer & Solution
Correct answer: B. Body-centred
1. The extra particle sits inside the cell, not on a face.
2. It is at the middle of the whole cell.
3. So the cell is body-centred.
_Source: syllabus Chemistry Part I, Chapter 1, The Solid State._
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