Question

explain by modern periodic table​

Answer 1

The modern periodic table is used to organize all the known elements. Elements are arranged in the table by increasing atomic number. In the modern periodic table, each element is represented by its chemical symbol. ... Rows of the periodic table are called periods

Answer 2

Explanation of Modern Periodic Table:

Elements are arranged in order of their increasing atomic numbers.

The vertical columns are known as groups and horizontal columns are known as periods; in the modern periodic table.

There are 18 groups and 7 periods in the modern periodic table.