Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • Stuck here, help me understand: Which of the following pairs has the same size?

Which of the following pairs has the same size?

  • Option 1)

    Fe^{2+}, Ni^{2+}

  • Option 2)

    Zr^{4+}, Ti^{4+}

  • Option 3)

    Zr^{4+}, Hf^{4+}

  • Option 4)

    Zn^{2+}, Hf^{4+}

 

Answers (1)

best_answer

As learnt in

Lanthanoid contraction -

The filling of if orbits before 5d orbits result regular decrease in atomic radii called Lanthanoid contraction or can say the size of radii not much increase.

- wherein

e.g.\:\:\:\:3d\rightarrow 4d\rightarrow 5d

 

 

 The atomic and ionic radii of second and third transition series elements are almost same because lanthanoid contraction does not let the size increase much on moving down the group.

Zr4+, He4+ belong to the second and third period transition series respectively.


Option 1)

Fe^{2+}, Ni^{2+}

This option is incorrect

Option 2)

Zr^{4+}, Ti^{4+}

This option is incorrect

Option 3)

Zr^{4+}, Hf^{4+}

This option is correct

Option 4)

Zn^{2+}, Hf^{4+}

This option is incorrect

Posted by

Plabita

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

NTA Overhaul: 1,000 secure exam centres, biometrics to prevent fraud, question paper changes, suggests panel
anam-khan

NEET syllabus 2025 out; NMC uploads subject-wise topics
anam-khan

What changes in NEET UG? Experts’ panel suggests multi-stage exam, security overhaul, simpler process to NTA

Latest Question