Terms starting with D
45 terms · page 1 of 2
d-Block Elements
The elements of groups 3 to 12, whose valence electrons fill d orbitals of the penultimate shell.
Foundations of ChemistryDalton's Atomic Theory
The 1808 model proposing that elements consist of indivisible atoms that are identical within an element and combine in fixed whole-number…
States of Matter & Gas LawsDalton's Law of Partial Pressures
The total pressure of a gas mixture equals the sum of the pressures each component would exert alone in the same volume.
Electrochemistry & RedoxDaniell Cell
The classic galvanic cell consisting of a zinc electrode in zinc sulfate and a copper electrode in copper sulfate.
Atomic Structure & Periodicityde Broglie Relation
The relation stating that every particle has an associated wavelength inversely proportional to its momentum.
Chemical EquilibriumDebye–Hückel Limiting Law
The theoretical relation predicting activity coefficients of ions in very dilute solution from their charge and the ionic strength.
Foundations of ChemistryDecantation
The separation of a liquid from a settled solid or a denser immiscible liquid by carefully pouring off the upper layer.
Nuclear & RadiochemistryDecay Constant
The probability per unit time that a given nucleus will decay.
Electrochemistry & RedoxDecomposition Potential
The minimum voltage that must be applied to an electrolytic cell before continuous electrolysis begins.
Stoichiometry & Chemical ReactionsDecomposition Reaction
A reaction in which a single compound breaks down into two or more simpler substances.
Atomic Structure & PeriodicityDegenerate Orbitals
Two or more orbitals in the same atom that have exactly the same energy.
Chemical EquilibriumDegree of Dissociation
The fraction of the original substance that has broken apart at equilibrium.
Acids, Bases & SaltsDegree of Hydrolysis
The fraction of a salt's ions that have reacted with water at equilibrium.
Acids, Bases & SaltsDegree of Ionisation
The fraction of dissolved electrolyte molecules that have broken into ions at equilibrium.
Biochemistry & Polymer ChemistryDegree of Polymerisation
The number of monomer units in an average polymer chain.
Stoichiometry & Chemical ReactionsDehydration Reaction
A reaction in which water is removed from a single molecule, generally producing an unsaturated or condensed product.
Foundations of ChemistryDeliquescence
The property of a solid that absorbs enough water vapour from the air to dissolve completely in the water it takes up.
Chemical Bonding & Molecular StructureDelocalisation
The spreading of electrons over three or more atoms rather than their confinement between two.
Biochemistry & Polymer ChemistryDenaturation
The loss of a protein's native three-dimensional structure without breaking its peptide bonds.
Foundations of ChemistryDensity
The mass of a substance contained in a unit volume, a characteristic intensive property of each material.
Inorganic & Coordination ChemistryDenticity
The number of donor atoms a single ligand uses to bind to one metal centre.
States of Matter & Gas LawsDeposition
The direct conversion of a vapour into a solid without an intermediate liquid phase.
Atomic Structure & PeriodicityDiagonal Relationship
The similarity in properties between an element of period 2 and the element one place to its lower right in period 3.
Atomic Structure & PeriodicityDiamagnetism
Weak repulsion from a magnetic field, shown by substances in which all electrons are spin-paired.