Answer :
Since the ions are held together by Strong electrostatic attractions, the amount of energy required is Large and ionic solids therefore have relatively High melting points.
Electrostatic forces are non-contact forces that push or pull on objects without actually making contact with them. A phenomenon known as "charge" can be transferred from one surface to another when certain materials are rubbed together. Uncharged objects are pulled by charged objects, while charged objects can be pushed or pulled by uncharged objects. Similar to the attraction between the opposing poles of two magnets, electrostatic attraction occurs when positively and negatively charged species move toward one another. Between two stationary point charges, the electrostatic force of attraction or repulsion is directly proportional to the product of their magnitudes and inversely proportional to the square of their separation. When the materials are rubbed together, electrons are taken out of their atoms, creating a static charge.
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