stoichiometry (Selina )
chemical equation TN4.2
the mole TN4.4
relative atomic mass TN4.3
formula TN4.1
the formula of an ionic compound from the charges on the ions present
word equations
balance simple symbol equations
a specifc number of particles called Avogadro’s constant
molar gas volume, taken as 24 dm3 at room temperature and pressure
stoichiometric reacting masses, volumes of gases and solutions, and concentrations of solutions expressed in g/dm3 and mol/dm3.
relative atomic mass, Ar , as the average mass of naturally occurring atoms of an element on a scale where the 12C atom has a mass of exactly 12 units
relative molecular mass, Mr , as the sum of the relative atomic masses (relative formula mass or Mr will be used for ionic compounds)
Using the symbols of the elements and write the formulae of simple compounds
Deduce the formula of a simple compound from the relative numbers of atoms present
Deduce the formula of a simple compound from a model or a diagrammatic representation
