This is a simple picture of a hydrogen atom using the Bohr model. A negatively charged electron can be seen on the outside of the positively charged proton.

From the Brockport High School Physics Labs web pages. Includes an excellent graphic depicting the energy levels of a hydrogen atoms and portraying the electron level transitions for the Lyman, Balmer, and Paschen series. Includes both...

Drawing of a caffeine molecule. Hydrogen = white; Carbon = blue; Oxygen = red

This diagram shows the chemical structure of methane. A methane molecule contains one carbon atom and four hydrogen atoms.