There's no need to learn all the elements in the periodic table , just learn the elements that have given in your previous examination. If you can able to memorize all those elements , you can learn all the elements. It will be no use for today, but it may be very useful for your future when you will become a scientist.

Yes, it is important to learn the whole periodic table. Here are the reasons why:

Understanding the Elements:

Learning the periodic table provides a comprehensive understanding of the elements, including their properties, atomic structure, and how they interact with one another. It is the foundation of chemistry and is crucial for anyone interested in pursuing a career in science.

Classification of Elements:

The periodic table classifies the elements according to their properties and atomic structure. It groups the elements into families and periods, which helps to identify their similarities and differences. Understanding these relationships can help predict the chemical behavior of an element and its reaction with other elements.

Chemical Reactions:

Knowing the periodic table is essential for predicting chemical reactions. The arrangement of elements in the periodic table helps determine which elements are more likely to form compounds and how they will react with other elements. This knowledge is crucial in fields such as medicine, agriculture, and industry.

Identifying Elements:

The periodic table is used to identify unknown elements. Each element has a unique atomic number, symbol, and name, making it easy to identify one element from another. This is important for scientists who need to identify unknown substances found in nature or during experiments.

In conclusion, learning the whole periodic table is important for anyone interested in pursuing a career in science, as well as for those who want to understand the world around them. It helps to classify elements, predict chemical reactions, and identify unknown substances.