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F4 CHEMISTRY INTRODUCTION ELEMENTS COMPOUNDS CHEMISTRY CHEMISTRY Study of MATTER CHANGE (SUBSTANCE) (REACTION) MATTER MATTER (SUBSTANCE) ELEMENT METAL METALLOID COMPOUND NON-METAL IONIC COMPOUND METAL & NON-METAL MOLECULAR COMPOUND NON-METAL CLASSIFICATION OF ELEMENTS ELEMENT METAL METAL: NON-METAL SEMI-METAL characteristic properties NON-METAL: characteristic properties METALLOID: characteristic properties ELEMENTS & SYMBOLS 1 2 3 4 5 6 7 8 9 10 Hydrogen^ H Helium^ He Lithium** Li Beryllium**Be (Boron) B Carbon^ C Nitrogen^ N Oxygen^ O Fluorine^ F Neon^ Ne 11 12 13 14 15 16 17 18 19 20 Sodium magnesium Aluminium Silicon Phosphorus Sulphur Chlorine Argon Potassium Calcium metals** non-metals^ (semi-metals) (http://www.webelements.com/webelements/schol ar/index.html) ELEMENTS & SYMBOLS (cont) BROMINE IODINE IRON COPPER ZINC LEAD SILVER GOLD MERCURY PLATINUM TIN BARIUM metals** non-metals^ (semi-metals) (http://www.webelements.com/webelement s/scholar/index.html) ELEMENTS (PROPERTIES) METALS Shiny ,strong SOLID Conductor (heat) Conductor (electricity) change shape Solids (high melting point/ boiling point) (mercury is liquid) NON-METALS SOLID, LIQUID, GAS (low mp, bp) Insulator (carbon has very high melting point) (carbon is a good conductor of electricity) SEMI-METALS Semi-conductor of electricity CLASSIFICATION OF COMPOUND COMPOUND IONIC COMPOUND IONIC COMPOUND: MOLECULAR COMPOUND characteristic properties MOLECULAR COMPOUND / COVALENT COMPOUND: characteristic properties COMPOUNDS & FORMULAE IONIC COMPOUND - Sodium chloride (NaCl) - Magnesium oxide (MgO) - Calcium chloride (CaCl2) COVALENT COMPOUND - Water (H2O) - Carbon dioxide (CO2) - Ammonia (NH3) COMPOUNDS (PROPERTIES) IONIC COMPOUNDS Hard SOLID (high melting point/ boiling point) ELECTROLYTE Insulator of electricity Soluble in water MOLECULAR COMPOUNDS SOLID, LIQUID, GAS (low mp, bp) INSULATOR of heat and electricity Soluble in non-polar solvent (hexane) CHANGE CHANGE PHYSICAL CHANGE CHEMICAL CHANGE PHYSICAL CHANGE: CHANGE OF STATE CHEMICAL CHANGE: CHANGE OF SUBSTANCE (FORMATION OF NEW SUBSTANCE) INVESTIGATING CHEMICAL CHANGE INVESTIGATING CHANGE EXPERIMENT EXPLANATION EXPERIMENTS: OBSERVATION OF CHANGE (MACROSCOPIC WORLD) EXPLANATION: NATURE OF MATTER PARTILCES (MICROSCOPIC WORLD) CHEMICAL CHANGE (EXPLANATION) FORMATION OF NEW SUBSTANCE (PARTICLES IN THE MICROSCOPIC WORLD): - BREAKING / FORMATION OF BONDS - RE-ARRANGEMENT OF ATOMS - MOVEMENT OF ELECTRONS PARTICLES IN THE MICROSCOPIC WORLD PARTICLE ATOM ATOM: MOLECULE ION BASIC UNIT(UNSTABLE PARTICLE) MOLECULE: STABLE PARTICLE (OF ATOMS) ION: STABLE PARTICLE (FROM ATOMS) THE ATOM (model) ATOM (NUCLEUS ) NEUTRONS(n) PROTONS(p) ELECTRONS(e) STABLE PARTICLES (FROM ATOM) ATOM n,p,e ATO M A ION ATO M + - MOLECULE CATION ANION (stable) (stable) (stable) B MATTER AND PARTICLES MATTER (SUBSTANCE) ELEMENT METAL ATOM METALLOID ATOM COMPOUND NON-METAL IONIC COMPOUND MOLECULAR COMPOUND MOLECULE CATION ANION MOLECULE BOND (BINDING FORCE BETWEEN PARTICLES) BOND METALLIC BOND COVALENT BOND IONIC BOND METALLIC BOND: BINDING METAL ATOMS (METAL) COVALENT BOND: BINDING NON-METAL ATOMS (MOLECULE) IONIC BOND: BINDING CATIONS & ANIONS (IONIC COMPOUND) NAME (SYMBOL / FORMULA) ELEMENT (SYMBOL) COMPOUND (FORMULA) ION (FORMULA) SIMPLE IONS (FORMULA) HYDROGEN LITHIUM SODIUM MAGNESIUM ALUMINIUM POTASSIUM CALCIUM (H+) (Li+) (Na+) (Mg++) (Al+++) (K+) (Ca++) OXIDE FLUORIDE SULPHIDE CHLORIDE (O--) (F- ) (S--) (Cl-) BROMIDE (Br- ) IODIDE (I- ) CATIONS (FORMULAE) Iron(II) Iron(III) Copper(I) Copper(II) Zinc Lead(II) Silver ( ( ( ( ( ( ( ) ) ) ) ) ) ) Ammonium HYDROGEN ( ( ) ) ANIONS (FORMULAE) Hydroxide ( Nitrate ( Sulphate ( Carbonate ( Hydrogensulphate Hydrogencarbonate Nitrite ( Sulphite ( Permanganate ( Dichromate ( ( ( ) ) ) ) ) ) ) ) ) ) IONIC COMPOUNDS (FORMULAE) IONIC COMPOUND (CATIONxANIONY) Sodium chloride Potassium oxide Calcium chloride Magnesium oxide Zinc sulphate Copper(II) chloride Ammonium nitrate (NaCl) (K2O) (CaCl2) (MgO) (ZnSO4) (CuCl2) (NH4NO3) IONIC COMPOUNDS (FORMULAE) – cont. Iron(II) nitrate Iron(III) sulphate Calcium hydroxide Sodium carbonate Zinc hydroxide Aluminium chloride Aluminium oxide Aluminium sulphate Ammonium nitrate Ammonium sulphate COVALENT COMPOUNDS (FORMULAE) Water Carbon dioxide Carbon monoxide Ammonia Methane Silicon dioxide Sulphur dioxide Sulphur trioxide (H2O) (CO2) (CO) (NH3) (CH4) (SiO2) (SO2) (SO3) COVALENT COMPOUNDS (FORMULAE) – cont. Hydrogen chloride Hydrochloric acid Sulphuric acid Nitric acid Ethanoic acid Citric acid Ethanol MOLECULES OF ELEMENTS & COMPOUNDS MOLECULE ELEMENT SIMPLE H2 GIANT C COMPOUND SIMPLE GIANT CO2 SiO2 CHEMICAL TESTS OXYGEN CARBON DIOXIDE WATER CATIONS – FLAME TEST ANION (CHLORIDE) ANION (CARBONATE)