Question

In a body centred cubic cell, an atom at the body of centre is shared
by:
(a) 1 unit cell (b) 2 unit cells (c) 3 unit cells (d) 4 unit cells

Answer 1

in bcc cell,an atom of the centre of the body is shared by 1 unit cell

Answer 2

1 unit cell. The atom at the center belongs exclusively to that unit cell only.