Terms starting with E
81 terms · page 2 of 4
Electron Affinity
The energy change when one mole of gaseous atoms each gains an electron to form gaseous negative ions.
Nuclear & RadiochemistryElectron Capture
Radioactive decay in which a nucleus absorbs an inner-shell electron, converting a proton into a neutron.
Atomic Structure & PeriodicityElectron Configuration
The notation describing how an atom's electrons are distributed among its available orbitals.
Chemical Bonding & Molecular StructureElectron Domain Geometry
The spatial arrangement of all electron domains — bonding and lone pairs alike — around a central atom.
Chemical Bonding & Molecular StructureElectron Sea Model
The model of metallic bonding in which fixed cations are immersed in a mobile cloud of delocalised valence electrons.
Atomic Structure & PeriodicityElectronegativity
The relative tendency of an atom in a covalent bond to attract the shared pair of electrons towards itself.
Organic ChemistryElectrophile
An electron-deficient species that seeks and accepts a pair of electrons from an electron-rich centre.
Organic ChemistryElectrophilic Addition
A reaction in which an electrophile adds across a carbon–carbon multiple bond, converting a pi bond into two sigma bonds.
Organic ChemistryElectrophilic Substitution
A reaction in which an electrophile replaces a hydrogen atom on an aromatic ring.
Analytical Chemistry & SpectroscopyElectrophoresis
A separation technique in which charged species migrate through a medium under an applied electric field.
Electrochemistry & RedoxElectroplating
The deposition of a thin metal coating onto a conducting surface by electrolysis.
Electrochemistry & RedoxElectrorefining
The purification of a metal by dissolving it from an impure anode and depositing it in pure form at the cathode.
Electrochemistry & RedoxElectrowinning
The extraction of a metal from a solution or molten salt of its ore by electrolysis.
Foundations of ChemistryElement
A pure substance composed entirely of atoms that share the same atomic number and therefore cannot be split into simpler substances by…
Chemical Kinetics & CatalysisElementary Reaction
A reaction that occurs in a single step exactly as written, with no detectable intermediate.
Stoichiometry & Chemical ReactionsElimination Reaction
A reaction in which two substituents are removed from adjacent atoms, generating a multiple bond.
Inorganic & Coordination ChemistryEllingham Diagram
A plot of the standard free energy of formation of metal oxides against temperature, used to choose a reduction route.
Foundations of ChemistryEmpirical Formula
The chemical formula giving the simplest whole-number ratio of atoms of each element in a compound.
Solutions & Colligative PropertiesEmulsion
A colloidal dispersion of one liquid as fine droplets throughout another liquid with which it is immiscible.
Organic ChemistryEnantiomer
One of a pair of stereoisomers that are non-superimposable mirror images of each other.
Acids, Bases & SaltsEnd Point
The point in a titration at which the indicator changes colour, signalling that the reaction is judged complete.
Thermochemistry & ThermodynamicsEndergonic Reaction
A reaction with a positive Gibbs free energy change, which requires an input of energy to proceed.
Stoichiometry & Chemical ReactionsEndothermic Reaction
A reaction that absorbs energy from the surroundings, giving a positive enthalpy change.
Chemical Kinetics & CatalysisEnergy Profile Diagram
A plot of potential energy against reaction coordinate showing reactants, transition states, intermediates and products.