Question

What is modern classification of periodic table​

Answer 1

Answer:

In the modern periodic table, elements are arranged in order of their increasing atomic numbers. 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.

Answer 2

Answer:

here's ur answer

Explanation:

The present form of a periodic table that is widely used across the globe is the long form of the periodic table. In this form of a periodic table, the horizontal rows are called periods and the vertical columns are known as the groups.

Groups consist of elements that have similar outer shell electronic configuration in their atoms. Previously the groups were named as IA,…VIIIA, VIII, IB…VIIB and 0. But now they are named as 1, 2, 3…18. In the modern periodic table, periods are the seven horizontal rows. Principle quantum number ‘n’ decides the period of the element. Principle quantum number (n) is one of the four quantum numbers (n, l, m, and s). It tells us about the principle electron shell. For example, if n= 3, then it indicates the principle shell as 3.