Chapter 6, Problem 28A

Interpretation Introduction

Interpretation:

The pattern is to be identified when elements are arranged with increasing atomic numbers in the modern periodic table.

Concept Introduction :

The periodic table is a columnar structure that organizes different elements into groups based on how they behave.The elements in the periodic table of today are ordered according to the periodic law.The elements are organized in the modern periodic table in increasing order of their atomic number.

Answer to Problem 28A

Periodic trends are observed in the physical and chemical properties of elements.

Explanation of Solution

Henry Moseley put forth the modern periodic law in 1913. The physical and chemical characteristics of the elements are periodic functions of their atomic numbers, according to the modern periodic law. Thus, the elements are organized in the modern periodic table in increasing order of their atomic number.

When elements are arranged in this way, a trend is observed in the physical and chemical properties of elements. This is called a periodic trend. The periodic trends are specific patterns found in the periodic table that highlight certain characteristics of a particular element.

It is also defined as a predictable change in an element's properties with an increase in atomic number.