`AB` crystallizes in a body centred cubic lattice with edge length `a` equal to `387p m` .The distance between two oppositely charged ions in the lattice is :

Options

A. 300 pm
B. 335 pm
C. 250 pm
D. 200 pm

Answer

B

Explanation

For BCC
`r^(+)+r^(-)=(sqrt(3)a)/(2)`
`:.r^(+)+r^(-)=(sqrt(3)xx387)/(2)` pm = 335.14 pm `~~` 335 pm