Looking at the alkali metals, which one would have the strongest Coulombic forces leading to the highest melting point when paired with the corresponding Halogen in the same row?
A
Lithium
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B
Sodium
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C
Potassium
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D
Rubidium
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Solution
The correct option is A Lithium Li, when paired with F, forms LiF which is strongest than others due to their small sizes. Li and F being similar in size forms strongest bond which results into a highest melting point.