Matter is made up of very small parts called atoms. Atoms can combine in different numbers and in different ways to make different molecules. Atoms and molecules make up all of the different ...

Christine Helms does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Chemistry X: College and AP Chem is a nicely designed educational app suitable for introductory undergraduate chemistry courses and advanced high school chemistry classes. Content within the app is ...

While daydreaming on a bus, and then while dozing by the fireside, Auguste Kekulé realized that carbon atoms can combine into ...