why are ionic compounds usually hard?

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Solution

Ionic compounds are usually hard as the ions present in the ionic compounds are held together by the strong electrostatic forces of attraction.

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Q. Why are the ionic compounds usually hard?

Q. Why ionic compounds are solids?

Q. (a) Show the formation of Na₂O by the transfer of electrons between the combining atoms.
(b) Why are ionic compounds usually hard?
(c) How is it that ionic compounds in the sold state do not conduct electricity but they do so when in molten state?
(d) What type of chemical bonds are present in CCl₄?
(e) What type of chemical bonds are present in MgCl₂?

Q. Assertion :Ionic compounds are generally hard solids Reason:

Hardness is due to the strong forces of attraction between constituent ions.

(a) What is the electronic configuration of (i) a sodium atom, and (ii) an oxygen atom?
(b) What is the number of outermost electrons in (i) a sodium atom, and (ii) an oxygen atom?
(c) show the formation of Na_2O by the transfer of electrons between the combining atoms.
(d) Why are ionic compounds usually hard?
(e) How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state?

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