Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : Size of Bk3+ ion is less than Np3+ ion.
Reason R : The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below :
Solution
Size of Bk<sup>3+</sup> is 98 pm<br><br>
Size of Np<sup>3+</sup> is 101 pm<br><br>
So size of Np<sup>3+</sup> is more than Bk3+ ion.<br><br>
there is a gradual decrease in the size of M<sup>3+</sup> ions
across the series. This may be referred to as the
actinoid contraction.
About this question
Subject: Chemistry · Chapter: d and f Block Elements · Topic: Properties of Transition Metals
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