Chapter 3, Problem 8STP

Interpretation Introduction

Interpretation:

In the periodic table of elements, the option that should be placed in the given category is to be determined.

Concept introduction:

Tabular arrangement of chemical elements is defined as periodic table. This table is organized by an increasing atomic number plus groups element according to the recurring properties.

Answer to Problem 8STP

Correct Answer: The correct option is (c).

Explanation of Solution

Reason for correct option: The periodic table is organized by rows and columns. The periodic table arranged the elements in the group which shows a similar chemical reaction, and the oxidation state of the elements in the group is the same except some groups. These elements are alkali in nature. So, they named alkali metals.

Hence, this is a correct option.

Conclusion

Reasons for incorrect options:

Option (a) The vertical lines in the periodic table is known as a row where they are lesser in number than the horizontal lines. There are no similarities in the chemical nature of elements. Hence, this is an incorrect option.

Option (b) Periods are classified elements based on the number of valance electronic shells, and they are arranged from left to right side of the periodic table. Hence, this is an incorrect option.

Option (d) Elements are made up of similar types of atoms. Elements are taken place in the periodic table, with the same chemical nature or number of the valence electron in the same shells. Hence, this is an incorrect option.