Atomic theory is a scientific explanation that describes the structure and behavior of atoms. It states that atoms are composed of a central nucleus containing protons and neutrons, with electrons orbiting around it in specific energy levels.
Atoms are the basic building blocks of matter. They are the smallest units of an element that still retain the chemical properties of that element.
Electron Configuration: Electron configuration refers to the arrangement or distribution pattern of electrons within an atom's electron energy levels.
Quantum mechanics is a branch of physics that deals with phenomena at very small scales, such as atomic and subatomic systems.