Question

Why ions have high melting point

Answer 1

ions have high melting point because of the strong electrostatic forces holding the oppositely charged ions together. hope it helps you
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Answer 2

:-):-):-):-):-):-):-):-):-)They have high melting because they have a strong force of attraction between their ions in order to overcome this strong bond high amount of heat is required. 
therefore ions have high melting point. :-):-):-):-):-)
.......................i hope its helpful.........