Metallic Bonding: Definition Metal?atoms are tightly packed together in?lattice?structures When the metal atoms are in lattice structures, the electrons in their outer shells are free to move throu...
Ionic Bonding: Examples Sodium chloride Sodium is a Group 1?metal It?loses?its outer electron to form a sodium ion with a +1 charge (Na+) Chlorine is a Group 7?non-metal It?gains?1 electron to form...
Ionic Bonding: Definition As a general rule,?metals?are on the?left?of the Periodic Table and?nonmetals?are on the?right-hand?side Ionic?bonding?involves the?transfer?of electrons from a?metallic?e...
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...
作為英聯(lián)邦國(guó)家，用A-Level成績(jī)申請(qǐng)澳洲大學(xué)很有優(yōu)勢(shì)。澳洲八大名校對(duì)于A-Level的成績(jī)要求比高考成績(jī)要寬松很多，升讀名校更容易。 澳大利亞八校聯(lián)盟（Group of Eight，簡(jiǎn)稱Go8或G8），又稱澳大利亞八大名校、澳...
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 ...
