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Chemistry 21 Online
OpenStudy (anonymous):

On the basis of electronegativity, which of these pairs of elements is most likely to form monatomic ions? K and Rb Ba and Ca Na and K Cl and Na @Physics

OpenStudy (anonymous):

Monatomic ions form when there is a large difference in electronegativity. In this case, it is Na and Cl. Electronegativity increases as you go right and decreases as you go down on the periodic table.

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