A solid compound XY has NaCI structure. If the radius of the cation is 100 pm, the radius of the anion will be:
275.1 pm
322.5 pm
241.5 pm
165.7 pm
As learnt in
Relation between radius of constituent particle, R and edge length, a for body centered cubic unit cell -
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In a BCC lattice, the oppositely charged ion occupies the centre while the corners are occupied by other ions. So, the distance between the centre and the corner,
Option 1)
275.1 pm
This option is incorrect
Option 2)
322.5 pm
This option is incorrect
Option 3)
241.5 pm
This option is correct
Option 4)
165.7 pm
This option is incorrect