How the Periodic Table groups the elements

The way the elements are arranged in the periodic table may look complicated, but much of it comes down to one simple pattern

Groups of the Periodic Table of Elements: Mr. Glass by Scott Glass

What do the elements in the same group in the periodic table have in common? - Quora

How to identify groups, periods, and blocks of elements on the basis of electronic configuration - Quora

Group (Chemistry) - Key Stage Wiki

Periodic Table of Elements - s-Ink · accessible science graphics

Group (periodic table) - Wikipedia

How to Read the Periodic Table, Groups & Periods

The Periodic Table and Atomic Structure

How to Find the Group and Period of an Element - Important Concepts for JEE