Page 8 - Spotlight A+ Form 4 & 5 Chemistry KSSM

Stable duplet Stable octet
electron electron Affect the solubility and boiling
arrangement arrangement point of covalent compounds
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Attraction force between H
atom and F, O and N atoms in
Group 18 elements different molecules

The shared pair of
Compound Formation Hydrogen Bond electrons comes
from the same atom

Dative Bond
Ionic Bond Chemical Bond Delocalised
Metallic Bond electrons

Metal and Lattice structure
non-metal Covalent Bond of metal ions

Formation of Non-metal Sea of electrons
cations and non-metal

Formation of Sharing of
anions electrons

Electrostatic Van der Waals
attraction forces attraction forces

Ionic compounds Covalent compounds

High melting and Low melting and
boiling points boiling points

Normally can dissolve Normally can
in water but cannot dissolve in organic
dissolve in inorganic solvent but cannot
solvent dissolve in water

Can conduct electricity Cannot conduct
in molten state or electricity
aqueous state

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