Question

a student reported the ionic radii of isoelectronic species x3+,y2+and z- as 136 pm ,64pm and 49 pm respectively is that order correct

Answer 1

Answer:

The order is incorrect

Since the Radii of anions are greater than that of cations.

the order should be

x3+ : 49pm

y2+ : 64pm

z- : 136pm

Hope it helps!

Answer 2

Answer:

Z-,Y2+,X3+

X3+,Y2+,Z- are isoelectronic

Thus, Zeff is in the order (Zeff Z-) < (Zeff Y2+)<(Zeff X3+)

Hence, ionic radii should be in the order :

rZ-,rY2+,X3+

So, the correct values are Z-,Y2+,X3+ with 49pm,64pm,136pm respectively.