CHAPTER 2: Atoms, elements, and compounds

2.1 Elements, compounds, and mixtures

An element is a pure substance that cannot be broken down into simpler substances by chemical means. 

For example: sulfur, potassium, etc

A compound is a pure substance made up of two or more elements that are chemically combined. 

For example: potassium sulfate, sulfur dioxide

A mixture is a combination of two or more substances that are not chemically combined.

For example: sand in water

Written by: Peter Ngugi

Edited by: Yoshicaa

I would like to acknowledge Charis Liao and Rayhankhan Pathan for providing me with the resources and materials that supported the creation of these notes.