Chapter 6, Problem 70A

Interpretation Introduction

Interpretation:

The given elements need to be arranged from greatest to least according to atomic radius and ionic radius.

Concept introduction:

Ionic radius can be defined as the radius of the ion in an atom. The atomic radius of a particular element is the measure of the atoms size. It can also be defined as the distance between its boundary and nucleus of the element

Answer to Problem 70A

Order of decreasing atomic radius is Chlorine > Carbon > Oxygen

Order of decreasing ionic radius is Chlorine > Oxygen > Carbon

Explanation of Solution

On moving across a period, the atomic radius decreases and on moving down the period, the atomic radius increases. Out of Chlorine, Oxygen and Carbon, Chlorine is placed further down than Oxygen and Carbon in the period table and so Chlorine has the largest atomic radius. Whereas, in the periodic table, Oxygen is the highest up and to the farthest right hence, oxygen has the smallest radius.

Therefore, order of decreasing atomic radius is Chlorine > Carbon > Oxygen

On moving down a period or across a period in the periodic table, the ionic radius increases. Out of the three elements, Chlorine and Oxygen are ionized to negatively charged atoms due to which it shows an increase in ionic radius while Carbon forms covalent bonds but if they get ionize they will have partial positive charge.

Therefore, Order of decreasing ionic radius is Chlorine > Oxygen > Carbon

Conclusion

Therefore, order of decreasing atomic radius is Chlorine > Carbon > Oxygen

Also, the order of decreasing ionic radius is Chlorine > Oxygen > Carbon