Electronegativity: Predicting Bond Formation The differences in Pauling electronegativity values can be used to predict whether a bond is?covalent?or?ionic?in character Electronegativity & cova...
Electronegativity: Trends Electronegativity?varies across?Periods?and down the Groups of the Periodic Table Down a group There is a?decrease?in?electronegativity?going down the Group The?nuclear ch...
Electronegativity: Definition Electronegativity?is the ability of an atom to attract a pair of electrons towards itself in a covalent bond This phenomenon arises from the?positive?nucleus’s ability...
Mole Calculations The number of moles of a substance can be found by using the following equation: It is important to be clear about the type of particle you are referring to when dealing with mole...
Water of Crystallisation Water of crystallisation?is when some compounds can form?crystals?which have?water?as part of their structure A compound that contains water of crystallisation is called a?...
Empirical & Molecular Formulae The?molecular?formula?is the formula that shows the?number?and?type?of each atom in a molecule Eg. the molecular formula of ethanoic acid is C2H4O2 The?empirical?...
Balancing Equations A?symbol?equation is a shorthand way of describing a chemical reaction using?chemical symbols?to show the number and type of each atom in the reactants and products A?word?equat...
Formulae of Ionic Compounds Ionic?compounds?are formed from a?metal?and a?nonmetal?bonded together Ionic compounds are electrically neutral; the positive charges equal the negative charges Charges ...
Mole & Avogadro Constant The?Avogadro constant?(NA?or?L) is the number of particles equivalent to the relative?atomic?mass?or?molecular mass?of a substance The Avogadro constant applies to atom...
