carbon-12, approximately 6.022 × 10^23.
Avogadro’s principle
Avogadro’s principle
The law stating that under the same conditions of temperature and pressure, equal volumes of
different gases will have the same number of molecules.
Azimuthal (angular momentum) quantum number (l)
Azimuthal (angular momentum) quantum number (l)
The second quantum number, denoting the sublevel or subshell in which an electron can be
found. Reveals the shape of the orbital. This quantum number represents the orbital angular
momentum of the motion of the electron about a point in space.
Balanced equation
Balanced equation
An equation for a chemical reaction in which the number of atoms for each element in the
reaction and the total charge are the same for the reactants and the products.
Barometer
Barometer
An instrument for measuring atmospheric pressure.Base
Base
A species that donates hydroxide ions or electrons, or that accepts protons. See Arrhenius base;
Basic solution; Brønsted-Lowry base; Lewis base.
Base dissociation constant (Kb)