Answer:
The edge length of the KCl unit cell is 314 pm.
Explanation:
In simple cubic unit cell the edge length of the unit cell id given by :
r = 0.5 a
r = radius pf the atom
a = edge length
We have :
Distance between the ions in KCl unit cell = d = 314 pm
And we know that :
d = 2r
d = 2 (0.5a)
d = 1.0a = a = 314 pm
So, this means that edge length of the KCl unit cell is 314 pm.
