Dimensionless numbers of chemistry

number of protons found in the nucleus of an atom

number that describes degree of oxidation of an atom in a chemical compound; the hypothetical charge that an atom would have if all bonds to atoms of different elements were fully ionic

thumb|alt=A water molecule is put into a see-through egg shape, which is color-coded by electrostatic potential. A concentration of red is near the top of the shape, where the oxygen atom is, and gradually shifts through yellow, green, and then to blue near the lower-right and lower-left corners of the shape where the hydrogen atoms are.|upright=1.5|right|Electrostatic potential map of a water molecule, where the oxygen atom has a more negative charge (red) than the positive (blue) hydrogen atoms Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to att

measure of an element's combining capacity with other atoms when it forms chemical compounds or molecules

electrostatic property of a molecule

chemical property

measure of the effective concentration of a species in a mixture

mass of iodine in grams that is consumed by 100 grams of a chemical substance

dimensionless numbers used in chemical engineering

value accounting for thermodynamic non-ideality of mixtures

abundance of one component of a mixture relative to others

dimensionless parameter that compares the rate of reaction in a liquid film to the rate of diffusion through the film

ratio of the amount of substance introduced by convection to that introduced by diffusion

dimensionless parameter in fluid mechanics

dimensionless number used in chemical engineering

dimensionless parameter in combustion

two related parameters used in description of the kinetics of electrochemical reactions

number of milligrams of potassium hydroxide required to neutralize the acetic acid taken up on acetylation of one gram of a chemical substance that contains free hydroxyl groups