6. What is the need for classification of elements? How does modern periodic law explain the followings
a) Metallic characters in period and group
b) Valency of the elements in period and group.
c) Atomic size
Answers
Answer:
The need for all classification of elements on the periodic table is that you need to know the periodic table of elements then you will only need to know the atomic number of the element and the element name.
Explanation:
Answer:
Explanation:
Need of Classification : It is difficult to study each and every element individually and to know its properties and uses. Therefore, they have been classified into groups on the basis of their similarities in properties.
Basis of Classification : Classification is done on the basis of similarities in properties so that the systematic study could be made about them.
Advantages of classifying elements in the Periodic Table
About 118 elements are known today.
Most of the elements known today were discovered during the 18th and 19th centuries.
Many scientists had contributed their priceless efforts in arranging the elements systematically in a table. This had led to the development of the Periodic Table that we use today.
The systematic classification of the elements in the Periodic Table has the following advantages.
It enables chemists to analyse and understand the properties of the elements and their compounds more systematically and orderly.
It enables chemists to predict the properties of the elements and their compounds based on their positions in the Periodic Table, and vice versa.
It becomes easier to study, understand, compare and contrast the related properties among the elements and their compounds from different groups.