Problem: Which isoelectronic series is correctly arranged in order of increasing radius?a. K+ < Ca2+ < Ar < Cl -b. Cl - < Ar < K+ < Ca2+c. Ca2+ < Ar < K+ < Cl -d. Ca2+ < K+ < Ar < Cl -e. Ca2+ < K+ < Cl - < Ar

FREE Expert Solution
96% (217 ratings)
FREE Expert Solution

We’re being asked to determine the proper sequence of the given isoelectronic series based on increasing ionic radiusAn isoelectronic series means the given ions have the same number of electrons


Recall that ionic radius is the size of an ion

The trend for the ionic radius is as follows: it increases from right to left and down a period in the periodic table. Ionic radius also increases with an increasing number of electrons.


For this problem, we need to compare the charges of the ions in the isoelectronic series

This will help us arrange the ions in increasing ionic radius.


96% (217 ratings)
Problem Details

Which isoelectronic series is correctly arranged in order of increasing radius?

a. K+ < Ca2+ < Ar < Cl -

b. Cl < Ar < K+ < Ca2+

c. Ca2+ < Ar < K+ < Cl -

d. Ca2+ < K+ < Ar < Cl -

e. Ca2+ < K+ < Cl - < Ar

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Periodic Trend: Ionic Radius concept. You can view video lessons to learn Periodic Trend: Ionic Radius Or if you need more Periodic Trend: Ionic Radius practice, you can also practice Periodic Trend: Ionic Radius practice problems .

How long does this problem take to solve?

Our expert Chemistry tutor, Shreya took 2 minutes to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Dixon's class at UCF.