Chapter 6.2, Problem 13LC

Interpretation Introduction

Interpretation:

The reason for the similar chemical and physical properties is to be determined.

Concept Introduction :

Elements of the same group have similar physical and chemical properties because of the same outer shell electronic configuration.

Answer to Problem 13LC

Because of the same outer shell electronic configuration.

Explanation of Solution

Sodium and potassium belong to group 1A. Outermost electrons participate in a chemical reaction and so decide their chemical properties.

Because of a common outer shell electrical configuration, elements belonging to the same group share similar physical and chemical characteristics. Also, the atomic size of potassium is comparable to that of sodium.

Therefore, the chemical properties of sodium and potassium are similar.

Conclusion

The position of elements in the periodic table helps in determining their properties.