Periodic Trends

Periodic Trends is a topic that is a foundation for your chemistry knowledge. 

Periodic Trends Infographic by Compound Interest

The following infographic has a monochromatic representation of the trends. Having the knowledge of these trends can help with your understanding of the behavior of the elements. Are there any that stand out? What pieces of information support your knowledge of the nature of some of these elements?

Infographic Showing Directions of Trends Overlaid

Trends in the Periodic Table (3:37)

Why are some elements reactive and some are not? 

Trends in the Periodic Table Part 2: Halogens (3:11)

Why are some elements reactive and some are not (specifically halogens)?