Answer :
The atoms potassium(K) and chlorine(Cl) are most likely to form ions and thus an ionic bond with each other.
What are ionic bonds?
An ionic bond is a particular kind of chemical bond that is created by the electrostatic attraction of two ions with opposing charges. These ions are produced when two atoms, typically a metal and a non-metal, exchange their valence electrons.
The elemental couples that have the highest likelihood of forming an ionic connection are Cl and K.
Since,
- Ionic compounds are created when an equal-sized cation (a metal ion) and anion (a non-metal ion) attract electrostatically. They form a more covalent bond if the cation and anion are of different sizes, with the cation being very small and the anion being very large.
- A single charged atom or a small group of charged atoms can form an ion (molecule). The elemental pairs most likely to form an ionic bond are Cl (non-metal) and K (metal).
- Metal ions (K) in this combination may give electrons, whereas non-metal ions (Cl) may accept electrons. Between elements that have a relatively low ionisation enthalpy and those that have a relatively high negative electron gain enthalpy, ionic compounds will form more readily.
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