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Structures - (CCEA)Physical properties of ionic compounds

Ionic bonding holds ions together in a giant lattice. Covalent bonds create simple molecules or giant covalent structures. Different types of bonding give a substance different properties.

Part of Chemistry (Single Science)Structures, trends, chemical reactions, quantitative chemistry and analysis

Physical properties of ionic compounds

  • high melting and boiling points. Ionic solids have a high and because it takes a substantial amount of energy to break the strong that hold the ions together.
CompoundMelting PointBoiling Point
NaCl801掳颁1,413掳颁
MgO2,852掳颁3,600掳颁
CompoundNaCl
Melting Point801掳颁
Boiling Point1,413掳颁
CompoundMgO
Melting Point2,852掳颁
Boiling Point3,600掳颁

The ionic bonding between Mg2+ and O2- ions is stronger than between Na+ and Cl- ions

  • electrical conductivity. Ionic compounds electricity when molten or dissolved in water because the ions can move and carry charge.
  • water solubility. Most ionic compounds are soluble in water and form
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