A covalent bond in which both electrons of the bonding pair are donated by only one of the bonded
atoms.
Covalent bond
A chemical bond formed by the sharing of an electron pair between two atoms. See Coordinate
covalent bond; Nonpolar covalent bond; Polar covalent bond.
Critical pressure
The vapor pressure at the critical temperature of a given substance.
Critical temperature
The highest temperature at which the liquid and vapor phases of a substance can coexist; above this
temperature the substance does not liquefy at any pressure.
Crystal
A solid whose atoms, ions, or molecules are arranged in a regular three-dimensional lattice
structure.
Cycloalkanes
Saturated cyclic compounds of the formula CnH 2 n.
d subshell
The subshells corresponding to the angular momentum quantum number l = 2, found in the third
and higher principal energy levels; each containing five orbitals.
Dalton’s law
The law stating that the sum of the partial pressures of the components of a gaseous mixture must
equal the total pressure of the sample.