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what is the definition of an ionic bond?
electrostatic attraction between oppositely charged ions
what is the structure of ionic compounds?
ionic crystal lattice
How does the size of an anion compare to a cation in an ionic compound?
anion is twice the size of cation
what is the melting/boiling point of ionic compounds?
high
why do ionic compounds have a high melting point?
the bonds between ions are strong.
In which state can ions not move around in?
solid
In which state can ionic compounds conduct electricty?
liquid
What is the solubility of ionic compounds in water?
soluble
why are ionic substances soluble in water?
ions form forces of attraction with water molecules
summarise the properties of ionic componds
high melting point, electrical conductors in liquid state and soluble in water
what is lattice enthalpy?
measurement of the strength ionic bond
what are the two main factors affecting lattice enthalpy?
radii and charge of ions
what happens to the lattice enthalpy when radii of ions increase?
decreases
what happens to the lattice enthalpy when charge of ions increase?
increases
why does lattice enthalpy decrease when radius increases?
centres of ions are further away from each other
what type of elements are present in ionic bondings?
metal + non-metal
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