Chapter 6, Problem 81A

Interpretation Introduction

Interpretation:

The elements oxygen, sulfur, tellurium, and selenium needs to be arranged in order of increasing atomic radii. The order is an example of group trend or period trend.

Concept introduction:

Atomic radii of an atom is the distance between the nuclei of two like atoms. Mathematically it is represented as follows:

$\text{r}=\frac{\text{d}}{\text{2}}$

Here, r represents radius of an atom and d represents the distance between the nuclei.

Answer to Problem 81A

The increasing atomic radii order is as follows:

Oxygen

The order is an example of a group trend.

Explanation of Solution

Oxygen, sulfur, tellurium, and selenium are the elements of the group 16. Since, atomic radii increases as go down the group and decreases across the period. In group 16, the order of the elements is as follows: oxygen, sulfur, selenium, tellurium. Therefore, the increasing atomic radii order of the Oxygen, sulfur, tellurium, and selenium is as follows:

Oxygen

The above order of atomic radii is applied as they all are the elements of same group. Therefore, the order is an example of a group trend.