Which of the following has the greatest electronegativity difference between the bonded atoms? A) A strong acid made of hydrogen and a halogen, such as HCl
B) A diatomic gas, such as nitrogen (N2)
C) Cartoon bonded to a group 6A (16) nonmetal chalcogen, such as in Co
D) A group 1 alkali metal bonded to chloride, such as RbCl

D) A group 1 alkali metal bonded to chloride, such as RbCl

Explanation:

Which of the following has the greatest electronegativity difference between the bonded atoms?

A) A strong acid made of hydrogen and a halogen, such as HCl

The electronegativity difference between H and Cl is:

ΔEN = |EN(H)-EN(Cl)| = |2.1-3.0| = 0.9

B) A diatomic gas, such as nitrogen (N₂)

The electronegativity difference between N and N is:

ΔEN = |EN(N)-EN(N)| = |3.0-3.0| = 0.0

C) Carbon bonded to a Group 6A (16) nonmetal chalcogen, such as in CO

The electronegativity difference between C and O is:

ΔEN = |EN(C)-EN(O)| = |2.5-3.5| = 1.0

D) A group 1 alkali metal bonded to chloride, such as RbCl

The electronegativity difference between Rb and Cl is:

ΔEN = |EN(Rb)-EN(Cl)| = |0.8-3.0| = 2.2

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