alleryStart learning →How does electronegativity differ from electron affinity?
AIt is measured in kilojoules a mole
BIt applies only to isolated atoms
CIt is calculated and carries no units
DIt is measured with a calorimeter
Answer & Solution
Correct answer: C. It is calculated and carries no units
1. Electron affinity is an energy, measured for a real gas phase atom and quoted in kilojoules per mole.
2. Electronegativity is not measured at all, it is calculated, and it carries no units.
3. Pauling derived it by comparing the energies needed to break different bonds.
4. He then placed the results on an arbitrary relative scale running from zero to four.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 7 "Chemical Bonding and Molecular Geometry", section Electronegativity versus Electron Affinity_
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