Question

r
When the radius ratio = is equal to 0.5, then
r
the coordination number of a given crystal is
(1) 3
(2) 6
(3) 8
(4) 12
I WORK
A
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Answer 1

Answer:

I think the answer is 6 because b/w ~0.4-~0.7 it has co ordination number is 6