1.

The arrangement of X-ions around A^(+) ion in solid AX is given in the figure (not drawn to scale). If the radius of X^(-) is 250 pm., the radius of A is ........

Answer»

104 PM 
125 pm 
183 pm 
57 pm 

Solution :
`(r_A^+)/(r_(X^-)) = 0.414implies r_(A)^(+) + 0.414 XX 250`
= 104 pm.


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