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The Periodic Table:  An Overview

The Periodic Table: An Overview

Author: Katie Smith

To introduce the periodic table and its order and format.
To review the positions of the representative elements, transition metals, lanthanides and actinides.
To review common names of groups, including noble gasses, halogens, alkali metals and alkaline earth metals.

In this video, we will look at some of the organizational features of the periodic table, including groups and periods, and the locations of categories such as representative elements, transition metals, lanthanides and actinides.

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What is the Periodic Table?

The periodic table, as we currently know it, is based on an observation by Dmitri Mendeleev.  Mendeleev noticed that, when you place elements in order by atomic mass, some properties repeat every 8 elements.  From this observation, Mendeleev created an early version of our periodic table where a new period (or row) began every 8 elements to display this periodic or cyclic behavior.  Since then, we have expanded on this idea to create our current model of the periodic table.

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Periodic Table Overview

This video will introduce the periodic table and show some of the key features that you will use or need to know when utilizing the table.

Practice Problems