Saturated
Describes a solution that has as much solute as possible.

Shell
A set of electron orbitals with the same principal quantum number.

Solubility
The upper limit to the concentration of a solute.

Solubility product
The constant obtained by multiplying the ion concentrations in a saturated solution.

Solute
The substance that is dissolved in a solution.

Solvent
The host substance of dominant abundance in a solution.

Standard temperature and pressure
0°C and 1 atmosphere.

States of matter
Solid, liquid, and gas.

Stoichoimetric
Refers to compounds or reactions in which the components are in fixed, whole-number ratios.

STP
Standard temperature and pressure, 0°C and 1 atmosphere.

Strong electrolyte
An acid, base, or salt that dissociates almost completely to ion in aqueous solution.

Structural formula
Depicts the bonding of atoms in a molecule.

Sublimation
The transformation of a solid directly to a gas without and intervening liquid state.

Subshell
A set of electron orbitals with the same principal and second quantum numbers.