Key definitions

Is loss of electrons or an increase in oxidation number.

(For oxidation and reduction remember OILRIG: Oxidation is loss, Reduction is gain)

Is gain of electrons or a decrease in oxidation number.

(For oxidation and reduction remember OILRIG: Oxidation is loss, Reduction is gain)

is a reagent that reduces (adds an electron to) another species.

is a reagent that oxidises (takes an electron from) another species.

is a measure of the number of electrons that an atom used to bond with atoms of another element. Oxidation numbers are derived from a set of rules.

refers to water molecules that form an essential part of the crystalline structure of a compound.

refers to a substance that contains no water molecules.

Refers to a substance that contains no water molecules.

Is a negalively charged ion.

is a positively charged ion

is any chemical compound formed from an acid when a H+ ion from the acid has been replaced by a metal ion or another positive ion, such as the ammonium ion, NH4+.

is a species that is a proton donor.

is a proton acceptor.

is the molar relationship between the relative quantities of substances taking part in a reaction.

Is loss of electrons or an increase in oxidation number.

(For oxidation and reduction remember OILRIG: Oxidation is loss, Reduction is gain)

Is gain of electrons or a decrease in oxidation number.

(For oxidation and reduction remember OILRIG: Oxidation is loss, Reduction is gain)

of a solution is the amount of a solute, in mol, dissolved per 1dm3 (1000 cm3) of solution.

is a reagent that reduces (adds an electron to) another species.

is a solution of known concentration. Standard solutions are normally used in titrations to determine unknown infomation about another substance.

is a reagent that oxidises (takes an electron from) another species.

Is gain of electrons or a decrease in oxidation number.

(For oxidation and reduction remember OILRIG: Oxidation is loss, Reduction is gain)

is a measure of the number of electrons that an atom used to bond with atoms of another element. Oxidation numbers are derived from a set of rules.

is a small group of atoms held together by covalent bonds.

refers to water molecules that form an essential part of the crystalline structure of a compound.

is the actual number of atoms of each element in a molecule.

refers to a substance that contains no water molecules.

is the simplest whole-number ratio of atoms of each element present in a compound.

is the volume per mole of a gas. The units of molar volume are dm3 mol-1. At room temperature and pressure, the molar volume is approximately 24.0 dm3 mol -1.

is the mass per mole of a substance. The units of molar mass are g mol-1.

Is a negalively charged ion.

is the number of atoms per mole of the carbon-12 isotope (6.02 x 10^23 mol-1)

is a positively charged ion

is the quantity whose unit is the mole. Chemists use 'amount of substance' as a means of countine atoms.

Is loss of electrons or an increase in oxidation number.

(For oxidation and reduction remember OILRIG: Oxidation is loss, Reduction is gain)

is any chemical compound formed from an acid when a H+ ion from the acid has been replaced by a metal ion or another positive ion, such as the ammonium ion, NH4+.

Is gain of electrons or a decrease in oxidation number.

(For oxidation and reduction remember OILRIG: Oxidation is loss, Reduction is gain)

is a species that is a proton donor.

is the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isotope.

is a reagent that reduces (adds an electron to) another species.

is a proton acceptor.

is a reagent that oxidises (takes an electron from) another species.

is the molar relationship between the relative quantities of substances taking part in a reaction.

is a measure of the number of electrons that an atom used to bond with atoms of another element. Oxidation numbers are derived from a set of rules.

is a type of partical that takes place in a chemical reaction.

refers to water molecules that form an essential part of the crystalline structure of a compound.

of a solution is the amount of a solute, in mol, dissolved per 1dm3 (1000 cm3) of solution.

refers to a substance that contains no water molecules.

is a solution of known concentration. Standard solutions are normally used in titrations to determine unknown infomation about another substance.

Refers to a substance that contains no water molecules.

is the volume per mole of a gas. The units of molar volume are dm3 mol-1. At room temperature and pressure, the molar volume is approximately 24.0 dm3 mol -1.

Is a negalively charged ion.

is a small group of atoms held together by covalent bonds.

is a positively charged ion

is the actual number of atoms of each element in a molecule.

is any chemical compound formed from an acid when a H+ ion from the acid has been replaced by a metal ion or another positive ion, such as the ammonium ion, NH4+.

is the simplest whole-number ratio of atoms of each element present in a compound.

is a reagent that reduces (adds an electron to) another species.

is the mass per mole of a substance. The units of molar mass are g mol-1.

is a proton acceptor.

is the number of atoms per mole of the carbon-12 isotope (6.02 x 10^23 mol-1)

is the molar relationship between the relative quantities of substances taking part in a reaction.

is the quantity whose unit is the mole. Chemists use 'amount of substance' as a means of countine atoms.

is a type of partical that takes place in a chemical reaction.

is the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isotope.

of a solution is the amount of a solute, in mol, dissolved per 1dm3 (1000 cm3) of solution.

is a positively or negatively charged atom or (covalently bonded) group of atoms (a molecular ion).

is a solution of known concentration. Standard solutions are normally used in titrations to determine unknown infomation about another substance.

is the volume per mole of a gas. The units of molar volume are dm3 mol-1. At room temperature and pressure, the molar volume is approximately 24.0 dm3 mol -1.

is a small group of atoms held together by covalent bonds.

Refers to a substance that contains no water molecules.

is the simplest whole-number ratio of atoms of each element present in a compound.

is the mass per mole of a substance. The units of molar mass are g mol-1.

is the number of atoms per mole of the carbon-12 isotope (6.02 x 10^23 mol-1)

is the quantity whose unit is the mole. Chemists use 'amount of substance' as a means of countine atoms.

is the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isotope.

is a positively or negatively charged atom or (covalently bonded) group of atoms (a molecular ion).