Science-pedia

Steric number is the number of atoms bonded to a central atom of a molecule plus the number of lone pairs attached to the central atom. The steric number of a molecule is used in VSEPR (valence shell electron pair repulsion) theory to determine the molecular geometry of a molecule.......... read more

QUANTUM NUMBER DEFINITION A quantum number is a value that is used when describing the energy levels available to atoms and molecules. An  electron  in an atom or ion has four  quantum numbers to describe its state and yield solutions to the Schrödinger wave equation for the hydrogen atom. There are four quantum numbers: n - principal quantum number - describes the energy level ℓ - azimuthal or angular momentum quantum number - describes the subshell m ℓ  or m - magnetic quantum number - describes the orbital of the subshell m s  or s - spin quantum number - describes the spin........ read more