Chapter 6.1, Problem 7LC

Interpretation Introduction

Interpretation:

Two elements having properties similar to sodium are to be identified.

Concept Introduction :

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

Answer to Problem 7LC

Lithium and potassium

Explanation of Solution

Sodium belongs to group 1. Other elements of group 1 are lithium, potassium, rubidium, cesium, and francium. 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 lithium and potassium are comparable to that of sodium.

Therefore, lithium and potassium have properties like sodium.

Conclusion

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