A student reported the ionic radii of isocelectronic species X^(3+), Y^(2+) and Z^- as 136 pm 64 pm and 49 pm respectively. Is that order correct ? Comment.

A student reported the ionic radii of isocelectronic species X^(3+), Y

1.	A student reported the ionic radii of isocelectronic species X^(3+), Y^(2+) and Z^- as 136 pm 64 pm and 49 pm respectively. Is that order correct ? Comment.
Answer» Solution :`:.` EFFECTIVE NUCLEAR charge is in the order `(Z_(EFF))_(z-)LT(Z_(eff))_X3+` and henceionic RADII should be in the order `r_z gt r_(y2+)gt r_(x3+)` `:.` The correct value are