Periodicity: Predicting Position & Properties If the?chemical?and?physical?properties?of an element are known, the?position?of that element in the Periodic Table can be predicted Similarly, pre...
Bonding in Period 3 Chlorides & Oxides Period 3 chlorides The bonding and structure of the Period 3 elements are summarised in the table below: The table shows that?Na,?Mg?and?Al?are metallic e...
Period 3: Trends in Electronegativity & Bonding Electronegativity Electronegativity?is the power of an element to draw the electrons towards itself in a covalent bond Going?across?the period, t...
Reaction of Period 3 Chlorides & Water Chlorides of Period 3 elements show characteristic behaviour when added to water which can be explained by looking at their?chemical bonding?and?structure...
Acid / Base Behaviour of Period 3 Oxides & Hydroxides Period 3 oxides Aluminium oxide is?amphoteric?which means that it can act both as a base (and react with an acid such as HCl) and an acid (...
Period 3: Oxides Reactions with oxygen & chlorine Reaction of Period 3 elements with oxygen table Reaction of Period 3 elements with chlorine table Reaction of sodium & magnesium with water...
Period 3: Structure & Bonding Melting point Melting points of the elements across Period 3 table Ions of Period 3 elements with increasing positive charge (metals) and increasing of outer elect...
Properties of the Elements in Period 3 Elements in the periodic table are arranged in order of increasing atomic number and placed in vertical columns (groups) and horizontal rows (periods) The ele...
Catalysts Catalysis?is the process in which the rate of a chemical reaction is increased, by adding a substance called a?catalyst A catalyst increases the rate of a reaction by providing the reacta...
Activation Energy For a reaction to take place, the reactant particles need to overcome a minimum amount of energy This energy is called the?activation energy (Ea) In?exothermic reactions?the react...
Rate of Reaction: Concentration & Pressure Concentration The more?concentrated?a solution is, the?greater?the number of?particles?in a given volume of solvent An increase in?concentration?cause...
Rate of Reaction: Collision Theory Reaction rate The?rate of a reaction?is the speed at which a chemical reaction takes place and has units?mol dm-3?s-1 The rate of a reaction can be calculated by:...
