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Arrange Ce3+, La3+, Pm3+ and Yb3+ in inc...

Arrange Ce3+, La3+, Pm3+ and Yb3+ in increasing order of their ionic radii. (a) Yb3+ < Pm3+ < Ce3+ < La3+ (b) Ce3+ < Yb3+ < Pm3+ < La3+ (c) Yb3+ < Pm3+ < La3+ < Ce3+ (d) Pm3+ < La3+ < Ce3+ < Yb3+ .

A

(Yb)^(3+)<(Pm)^(3+)<(Ce)^(3+)<(La)^(3+)

B

(Ce)^(3+)<(Yb) ^(3+)<(Pm)^(3+)<(La)^(3+)

C

(Yb)^(3+)<(Pm)^(3 +)<(La)^(3+)<(Ce)^(3+)

D

(Pm)^(3+)<(La)^(3+)<(Ce)^(3+)<(Yb)^(3+)

Text Solution

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The correct Answer is:
A
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