Question

Describe the principles of classification of elements in detail. ​

Answer 1

Answer:

The elements are arranged in the increasing order of their atomic number. This was done by Henry Moseley. The modern periodic table is based on the Modern Periodic Law. Modern Periodic Law : Physical and Chemical properties of the elements are the the periodic functions of their atomic number.

Answer 2

Explanation:

HEY MATE ........

:Periodic Classification of Elements Characteristics:

➞In the long form periodic table the elements are arranged in the order of their atomic numbers. Atomic number of an element is equal to the number of protons inside the nucleus of its atom.The general features of the long form periodic table are:

➞There are in all, 18 vertical columns and 18 groups in the long form periodic table.

➞These groups are numbered from 1 to 18 starting from the left.

➞There are seven horizontal rows called periods in the long form periodic table. Thus, there are seven periods in the long form periodic table.

➞The elements of Groups 1, 2 and 13 to 17 are called the main group elements. These are also called typical or representative or normal elements.

➞The elements of Groups 3 to 12 are called transition elements.

➞Elements with atomic number 58 to 71 (Ce to Lu) occurring after lanthanum (La) are called lanthanides. Elements with atomic numbers 90 to 103 (Th to Lw) are called actinides.

➞ These elements are called f-block elements and also as inner transition elements.

Significance of the Periodic Classification of Elements:

➞Makes the study of elements easy: Classification of elements in groups provide us with a fixed pattern in which the elements change their properties periodically.

➞The periodic table made the study of the physical and chemical properties of elements simple and organized. We can now just go to the group and see the properties of the elements of the periodic table or predict the properties of an element if we know the characteristics of other elements present in the same group.

Helps in discovering new elements:

➞ Although there are so many elements that are already discovered, there are chances that new elements can be discovered.

➞Scientists can take the help of a periodic table and know the trending characteristics based on the properties of elements and hence can identify the new elements with the existing ones. Besides, researchers are continuously striving to discover new elements and explore their properties.

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