Chapter 20, Problem 11STP

Interpretation Introduction

Interpretation: The formation of sulphide ion from sulfur atom must be represented diagrammatically and the type of reaction (oxidation or reduction) must be mentioned.

Concept Introduction:

When an atom or molecule loses an electron, the process is called oxidation. The radius of an atom decreases when an electron is lost from the orbit.

Answer to Problem 11STP

Reduction

Explanation of Solution

The diagram represents the formation of sulphide ions from the sulphur atom.

  

Sulphur atoms contain 16 electrons which gain 2 electrons and become sulphide ions ${\text{S}}^{2-}$ and the number of electrons in sulphide ions becomes 18. Therefore, the sulphur atom reduces to form a sulphide ion.