Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • The correct order of ionic radii of ,<img alt="\mathrm{La^3^+,Eu^3^+}" src="

The correct order of ionic radii of \mathrm{Y^3^+},\mathrm{La^3^+,Eu^3^+} and \mathrm{Lu^3^+} is

Option: 1

\mathrm{Y^{3+}<L a^{3+}<E u^{3+}<L u^{3+}}


Option: 2

\mathrm{Y^3^+<Lu^3^+<Eu^3^+<La^3^+}


Option: 3

\mathrm{Lu^3^+<Eu^3^+<La^3^+<Y^3^+}


Option: 4

\mathrm{La^3^+<Eu^3^+<Lu^3^+<Y^3^+}


Answers (1)

best_answer

As we have learnt, 

The size of tripositive Lanthanoid ions decreases smoothly on moving across the period due to Lanthanoid Contraction.

Ionic radii decrease from \mathrm{La^3^+} to \mathrm{Lu^3^+}due to lanthanoid contraction and Yttrium(Y) is a period 5 element and will be smaller than the lanthanoids.

Thus, order of ionic radii is \mathrm{La^3^+>Eu^3^+>Lu^3^+>Y^3^+}

Therefore, option (2) is correct.

Posted by

Deependra Verma

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NEET: CBI takes over case of aspirant's death in Patna hostel; FIR registered
anam-khan

NEET 2026 LIVE: UG registration begins at neet.nta.nic.in; documents, photograph, exam schedule, admit card
anam-khan

NEET: Protest at Jantar Mantar seeks impartial probe into student's death in Patna

Latest Question