Chemistry (Symbols)¶
Symbols of physical quantities related to chemistry.
- mass_fraction¶
Mass fraction of a substance within a mixture is the ratio of the mass of the substance to the total mass of the mixture.
- Symbol:
w- Latex:
\(w\)
- Dimension:
dimensionless
- amount_of_substance¶
Amount of substance in a given sample of matter is defined as a ratio between the number of elementary entities and the Avogadro constant.
- Symbol:
n- Latex:
\(n\)
- Dimension:
amount_of_substance
- density_of_states¶
The density of states of a system describes describes the number of allowed modes or states per unit energy range.
- Symbol:
D- Latex:
\(D\)
- Dimension:
1/volume
- band_gap¶
A band gap, or energy gap, is an energy range in a solid where no electronic states exist.
- Symbol:
E_g- Latex:
\(E_\text{g}\)
- Dimension:
energy
- work_function¶
Work function is the minimum thermodynamic work (i.e., energy) needed to remove an electron from a solid to a point in the vacuum immediately outside the solid surface.
- Symbol:
W- Latex:
\(W\)
- Dimension:
energy
- drift_velocity¶
Drift velocity is the average velocity attained by charged particles, such as electrons, in a material due to an electric field.
- Symbol:
u- Latex:
\(u\)
- Dimension:
velocity
- molar_concentration¶
Molar concentration, or molarity, is a quantity most commonly defined as amount of substance of solute per unit volume of solution, or per unit volume available to the species.
- Symbol:
c- Latex:
\(c\)
- Dimension:
amount_of_substance/volume
- ionization_coefficient¶
Ionization coefficient can be defined as the mean number of ionization processes over the distance covered in the direction of the electric field.
Links:
- Symbol:
alpha- Latex:
\(\alpha\)
- Dimension:
1/length
- cross_section¶
Cross section is a measure of the probability that a specific process will take place in a collision of two particles.
Links:
- Symbol:
sigma- Latex:
\(\sigma\)
- Dimension:
area
- atomic_number¶
The atomic number or nuclear charge number of a chemical element is the charge number of its atomic nucleus.
Links:
- Symbol:
Z- Latex:
\(Z\)
- Dimension:
dimensionless
- valence¶
Valence of an atom is a measure of its combining capacity with other atoms when it forms chemical compounds or molecules, and is generally understood to be the number of chemical bonds that each atom of a given chemical element typically forms.
Links:
- Symbol:
v- Latex:
\(v\)
- Dimension:
dimensionless
- equilibrium_constant¶
The equilibrium constant expresses the relationship between products and reactants of a reaction at equilibrium with respect to a specific unit.
Links:
- Symbol:
K- Latex:
\(K\)
- Dimension:
dimensionless
- electrochemical_equivalent¶
The electrochemical equivalent of a chemical element is the mass of that element transported by a specific quantity of electricity, usually charge.
- Symbol:
Z- Latex:
\(Z\)
- Dimension:
mass/charge
- mobility¶
Electrical mobility is the ability of charged particles to move through a medium in response to an electric field that is pulling them.
Links:
- Symbol:
mu- Latex:
\(\mu\)
- Dimension:
area/(time*voltage)
- diffusion_coefficient¶
Diffusion coefficient, also referred to as (mass) diffusivity, is the proportionality constant between the molar flux due to molecular diffusion and the negative value of the gradient in the concentration of the species. In simpler terms, it is the amount of a particular substance that diffuses across a unit area in unit time under the influence of a gradient of one unit.
Links:
- Symbol:
D- Latex:
\(D\)
- Dimension:
area/time