Differences between Ionic/Covalent Compounds Covalent Compounds Ionic Compounds How to Non-Metal + Non-Metal(s) Metal + Non-Metal(s) Recognise e.g. hydrogen oxide Sodium chloride Particles Molecules Ions (which are NEUTRAL) (charged particles + or -) Forces of Weak forces between Ions attract strongly attraction molecules (held in a rigid IONIC between LATTICE) particles Melting + *Low *High Boiling LOVALENT HIONIC Points Solubility Dissolve in Dissolve in WATER SOLVENTS e.g. ethanol Conductivity NEVER Only when dissolved in or MOLTEN Ions Are Free To Move *** EXCEPTION: COVALENT NETWORK SUBSTANCES
Differences between Ionic/Covalent Compounds Covalent Compounds Ionic Compounds How to Recognise e.g. Non-Metal + Non-Metal(s) hydrogen oxide Metal + Non-Metal(s) Sodium chloride Particles Molecules (which are NEUTRAL) Ions (charged particles + or -) Forces of attraction between particles Weak forces between molecules Ions attract strongly (held in a rigid IONIC LATTICE) Melting + Boiling Points *Low LOVALENT *High HIONIC Solubility Dissolve in SOLVENTS e.g. ethanol Dissolve in WATER Conductivity NEVER Only when dissolved in or MOLTEN Ions Are Free To Move *** EXCEPTION: COVALENT NETWORK SUBSTANCES
UNIT-1-SUMMARY-NOTES-2-1eorxzd.docx