In A Hydrogen Fluoride (Hf) Molecule, A Hydrogen Atom And Flouride Atom Are Held Together By A Polar Covalent Bond. Which Of The Following Best Explai

In a hydrogen fluoride (HF) molecule, a hydrogen atom and flouride atom are held together by a polar covalent bond. which of the following best explains why this bond is polar?

A. The large difference in the atomic radii of hydrogen and fluorine atoms
B. The large difference in the atomic mass of hydrogen and fluorine atoms
C. The large difference in the Electronegativities of hydrogen and Fluorine atoms
D. The large difference in the number of electrons of hydrogen and fluorine atoms.

 

(C)

In HF, Hydrogen(2.1) and Flourine(3.9) have large difference in electronegativities.

Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electron towards itself.

More electronegativity for Flourine, thus, means it pull shared electron pair more towards itself than Hydrogen does. This causes Flourine to acquire partial negative charge and hydrogen to devolop partial positive charge. This results in a polar covalent bond.


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