Which actinoid from the following in its +3 s | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) In the actinoid series,as the atomic number increases,the ionic radius decreases due to the actinoid contraction,which is analogous to lanthanoid

Vedclass · Accepted Answer

$U$

Vedclass · Answer

(A) In the actinoid series,as the atomic number increases,the ionic radius decreases due to the actinoid contraction,which is analogous to lanthanoid contraction. This occurs because the $5f$ electrons provide poor shielding for the increasing nuclear charge. Therefore,the actinoid with the lowest atomic number will have the largest ionic radius in its $+3$ state. Comparing the atomic numbers: $U$ $(Z=92)$,$Bk$ $(Z=97)$,$Es$ $(Z=99)$,and $Md$ $(Z=101)$. Since $U$ has the lowest atomic number among the given options,it has the largest size in its $+3$ state.

Which actinoid from the following in its $+3$ state has the largest size?

Similar Questions

Fill in the blanks:
$1.$ The size of $M^{3+}$ ions in the actinoid series ........... with an increase in atomic number.
$2.$ The common oxidation state of elements in the actinoid series is .......... .
$3.$ The appearance of elements in the actinoid series is like .......... .

Which lanthanoid element exhibits $+2$ and $+3$ oxidation states?

Which of the following is $NOT$ a lanthanoid element?

The $f$ orbitals are half-filled and completely filled,respectively,in which of the following lanthanide ions?
(Given: Atomic numbers: $Eu=63, Sm=62, Tm=69, Tb=65, Yb=70, Dy=66$)

Which of the following elements exhibits oxidation states other than $+3$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module