Chapter 9, Problem 8STP

Interpretation Introduction

Interpretation: The formula of the compound formed by potassium and oxygen is to be determined.

Concept Introduction : Ionic compounds are formed by the transfer of electrons from the metal to non-metal. They have very high melting and boiling point.

Answer to Problem 8STP

The correct option is (C).

Explanation of Solution

The given elements are potassium and oxygen. Potassium and oxygen belong to Group 1A and Group 6A. Potassium and oxygen have 1 valence electron and 6 valence electrons respectively.

Potassium loses its 1 electron to form ${\text{K}}^{+}$ and oxygen gains 2 electrons to form ${\text{O}}^{2-}$ . Thus, the chemical formula formed by the given pair of elements is ${\text{K}}_{\text{2}}\text{O}$ .

Therefore, the correct option is (C).