Question

discuss thd main features of the long forms of the periodic table. Give its important advantages and disadvantages?​

Answer 1

Answer:

The modern periodic law states that the physical and chemical properties of the elements are the periodic functions of their atomic numbers. Scientists arranged elements in increasing order of their atomic numbers from left to right across each row.

The modern or long form of the periodic table is based on the modern periodic law. The table is the arrangement of elements in increasing order of their atomic numbers. The modern periodic table is the present form of the periodic table. And it consists of 18 vertical columns and 7 horizontal rows.

Groups in the Modern Periodic Table:

· Groups are the vertical columns in the modern or long form of the periodic table.

· There are 18 groups in the periodic table.

· These groups are numbered from 1 to 18.