Definition of electron affinity
1 : the degree to which an atom or molecule attracts additional electrons
2 : the minimum energy required to remove an electron from a negative ion to produce a neutral atom or molecule
3 : the negative of the energy required to introduce an additional initially free electron into a crystal
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up electron affinity? Please tell us where you read or heard it (including the quote, if possible).