If coordination number is 6, the radius is _______?

اگر کوآرڈینیشن نمبر 6 ہے تو ، رداس _______ ہے؟

0.225

0.414

0.155

None of these

For a coordination number of 6, the radius ratio ( $r_c / r_a$ ) is 0.414 based on ionic packing.

This ratio helps determine the stability and geometry of ionic structures.