Front-end Architecture with Atomic Design
The smallest indivisible particle of matter. Today, we all know that it's not like that, but we'll get there. Atoms is like our inputs, buttons, labels etc. And on their own are almost useless. Group of Atoms. Following the previous example, joining our inputs (e-mail and password),labels ("e-mail" and "password") and button, we build a molecule-form.
https://medium.com/atomic-design/front-end-architecture-with-atomic-design-516e1971b4f5