( iii ) Hydrogen Bonded Molecular Solid s :
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Hydrogen Bonded Molecular Solids contain polar covalent bonds between H and F , O or N atoms .
Strong hydrogen bonding binds molecules of such solids like H2O ( ice ).
They are non-conductors of electricity and are volatile liquids or soft solids under room temperature and pressure .
Ionic Solids o The constituent particles of these solids are ions .
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The solid is composed of three dimensional arrangements of cations and anions that are bonded by strong coulombic ( electrostatic ) forces .