Questions  

Which of the following order of radii is correct?

Remember concepts with our Masterclasses.

80k Users
60 mins Expert Faculty Ask Questions
a
Li<Be<Mg
b
H+<Li+<H
c
O<F<Ne
d
Na+>F>O2

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is B

As we move across the period, ionic radii decrease as e  are filled in the same shell thereby increasing effective nucleus charge and resulting in larger attraction. Hence, the size (radii) decreases.

As we move down the group, ionic radii increase as they are e added to the new shell due to which the effective nuclear charge decreases and thus the size increases.

Also, cations are smaller in size than the anions as in cations' number of  p+>no. of e due to which e are more strongly pulled towards the nucleus thereby decreasing the size.

Anions are bigger in size as no. of  p+< no. of  e, so the e pull by the nucleus is less hence bigger size.

 H+<Li+<H is the correct order.

Talk to our academic expert!

+91

Are you a Sri Chaitanya student?

ctaimg

Create Your Own Test
Your Topic, Your Difficulty, Your Pace



Practice More Questions

Easy Questions

Moderate Questions

Difficult Questions


Download the app

phone icon
whats app icon