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1 May, 15:05

Which pair of atoms has the highest electronegativity difference?

A. Na-F

B. Ca-F

C. H-F

D. C-F

E. F-F

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Answers (2)
  1. 1 May, 18:27
    0
    The B. Ca-F pair has the greatest electronegativity difference.

    Electronegativities increase from the lower left to the upper right in the Periodic Table.

    Ca is closest to the lower left, and F is in the upper right, so the Ca-F bond has the greatest electronegativity difference.
  2. 1 May, 18:58
    0
    Answer: Option (B) is the correct answer.

    Explanation:

    Electronegativity is defined as the ability of an atom to attract an electron towards itself.

    Values of electronegativity of the given atoms are as follows.

    Sodium = 0.93

    Fluorine = 3.98

    Calcium = 1.00

    Hydrogen = 2.20

    Carbon = 2.55

    Therefore, electronegativity difference of the given pairs are as follows.

    Na-F = 3.98 - 0.93 = 3.05

    Ca-F = 3.98 - 1.00 = 1.98

    H-F = 3.98 - 2.20 = 1.78

    C-F = 3.98 - 2.55 = 1.43

    F-F = 3.98 - 3.98 = 0

    Hence, we can conclude that the highest electronegativity difference is for pair Ca-F.
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