The Bohr model is a simplified representation of an atom proposed by Niels Bohr. It suggests that electrons orbit around the nucleus in fixed energy levels or shells, similar to planets orbiting around the sun.
The branch of physics that describes phenomena at very small scales, such as atomic and subatomic particles.
Ground State: The lowest energy state an electron can occupy within an atom.
Excited State: When an electron absorbs energy and moves to a higher energy level, it is said to be in an excited state.