Which one of the following is the correct increasing order of the magnitude of ionic radii of C e 3 + , L a 3 + , P m 3 + and Y b 3 + ?

Question

Which one of the following is the correct increasing order of the magnitude of ionic radii of C e 3 + , L a 3 + , P m 3 + and Y b 3 + ?, Y b 3 + P m 3 + L a 3 + C e 3 +, Y b 3 + P m 3 + C e 3 + L a 3 +, P m 3 + L a 3 + C e 3 + Y b 3 +, C e 3 + Y b 3 + P m 3 + L a 3 +

MARKS App · Accepted Answer

In case of lanthenides with the increase of atomic number atomic and ionic size decrease constantly but slightly due to poor screening effect by inner electrons. L a 3 + 103 p m > C e 3 + 102 p m > P m 3 + 97 p m > Y b 3 + 86.8 p m

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