Chapter 3: Classification of Elements and Periodicity in Properties (CBSE Class 11)

Introduction

• The periodic Table is the most important concept in chemistry, both in principle and in practice.
• The periodic table is considered one of the greatest scientific achievements as it provides the vast amount of information available on the chemical behaviour of the elements into a few single and logical patterns.
• It is a remarkable demonstration of the fact that chemical elements are not a random cluster of entities but instead display trends and lie together in families.

Why Do We Need to Classify Elements?

Genesis of Periodic Classification

Modern Periodic Law and the Present Form of Periodic Table

Nomenclature of Elements with Atomic Numbers Greater than 100

Electronic Configurations of Elements and the Periodic Table

Electronic Configurations and Types of Elements: s-Block, p-Block, d-Block and f-Block Elements

The s-Block Element

The p-Block Elements

The d-Block Elements

The f-Block Elements

Periodic Trends in Properties of Elements