The greater electronegativity difference bewteen two atoms bonded together, the greater the bond's percentage of ______

a. ionic character
b. nonpolar character
c.metallic character
d.electron sharing
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read it all, you need to understand this concept, but pay particular attention to the last section Rule of Thumb

http://www.mikeblaber.org/oldwine/chm1045/notes/Bonding/Polarity/Bond05.htm

To determine the bond's percentage of ionic character between two atoms bonded together, you need to consider their electronegativity difference. Electronegativity is a measure of an atom's ability to attract electrons towards itself in a chemical bond. The greater the electronegativity difference between two atoms, the more polar the bond will be.

In this case, since the question asks for the bond's percentage of a specific character, we can eliminate options c (metallic character) and d (electron sharing) because these characteristics are not directly related to electronegativity differences.

To find the correct answer, we need to analyze the remaining options a (ionic character) and b (nonpolar character). The greater electronegativity difference between two atoms indicates a higher degree of unequal electron distribution in the bond, favoring the formation of an ionic bond. Ionic bonds occur when there is a large electronegativity difference between two atoms, resulting in the transfer of electrons from one atom to another.

On the other hand, a nonpolar bond occurs when there is little or no electronegativity difference between the bonded atoms, leading to equal sharing of electrons. So, the greater the electronegativity difference, the lower the percentage of nonpolar character in the bond.

Based on this analysis, the correct answer is:

a. ionic character