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Which of the following pairs will form the most stable ionic bond?

1. (a) Na and Cl
2. (b) Mg and F
3. (c) Li and F
4. (d) Na and F

Correct answer: (b) Mg and F

Solution

Mg and F form the most stable ionic bond because Mg has a high charge density (+2) and F is highly electronegative, leading to a strong electrostatic attraction.

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