Terms starting with A
77 terms · page 2 of 4
Alcohol
An organic compound containing a hydroxyl group bonded to a saturated carbon atom.
Organic ChemistryAldehyde
A compound containing a carbonyl group bonded to at least one hydrogen atom, so it lies at the end of a chain.
Organic ChemistryAldol Condensation
The base-catalysed reaction of two carbonyl compounds to give a beta-hydroxy carbonyl, which often dehydrates to an enone.
Atomic Structure & PeriodicityAlkali Metals
The group 1 elements — lithium through francium — which have a single valence s electron.
Atomic Structure & PeriodicityAlkaline Earth Metals
The group 2 elements — beryllium through radium — which have two valence s electrons.
Organic ChemistryAlkane
A saturated hydrocarbon containing only single carbon–carbon bonds.
Organic ChemistryAlkene
An unsaturated hydrocarbon containing at least one carbon–carbon double bond.
Organic ChemistryAlkyne
An unsaturated hydrocarbon containing at least one carbon–carbon triple bond.
Foundations of ChemistryAllotropy
The existence of an element in two or more distinct structural forms within the same physical state.
Inorganic & Coordination ChemistryAlloy
A metallic material made by combining a metal with one or more other elements.
Nuclear & RadiochemistryAlpha Decay
Radioactive decay in which a nucleus emits a helium-4 nucleus, losing two protons and two neutrons.
Inorganic & Coordination ChemistryAmbidentate Ligand
A monodentate ligand possessing two different potential donor atoms, either of which may bind.
Organic ChemistryAmide
A compound in which a carbonyl group is bonded directly to nitrogen.
Organic ChemistryAmine
A compound derived from ammonia by replacing one or more hydrogens with alkyl or aryl groups.
Biochemistry & Polymer ChemistryAmino Acid
An organic compound containing both an amino group and a carboxyl group attached to the same carbon.
States of Matter & Gas LawsAmorphous Solid
A solid whose particles lack long-range order, showing only the short-range regularity characteristic of a frozen liquid.
Acids, Bases & SaltsAmphiprotic Species
A species that can both donate and accept a proton.
Acids, Bases & SaltsAmphoteric Substance
A substance able to react as either an acid or a base depending on what it meets.
Analytical Chemistry & SpectroscopyAnalyte
The specific substance whose presence or amount is being determined in an analysis.
Analytical Chemistry & SpectroscopyAnalytical Chemistry
The branch of chemistry concerned with identifying substances and determining how much of each is present.
Foundations of ChemistryAnhydrous
Describing a substance from which all water, including water of crystallisation, has been removed.
Foundations of ChemistryAnion
A negatively charged ion produced when an atom or molecule gains one or more electrons.
States of Matter & Gas LawsAnisotropy
The dependence of a physical property on the direction in which it is measured.
Electrochemistry & RedoxAnode
The electrode at which oxidation occurs.