Interpretation:Wheher potassium nitrate
Concept introduction:Electronegativity difference
In ionic bond one atom completely gives up one or more electrons to become a cation and another atom takes up that electrons to become an anion. This cation and anion are joined by the electrostatic force of attraction to form an ionic compound.So, electronegativity difference between two atoms that form an ionic bond should be high enough.
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Principles of General Chemistry
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