Ages

Introduction

Summary

The horizontal rows of the table are called periods and each of their elements have the same number of electron shells. The columns (groups or families) contain elements that have the same number of electrons in their outermost shell, which results  in  very similar  chemical properties. Some of these groups are highlighted.
The atomic radius is a periodic property.

Goals

• To observe the periodicity of atomic radii. 

Features

Rollover the element to see their names and atomic radii.

Tags

atom radius Mendeleev periodic-table element alkaline