Assertion: electron affinity | /r/HasProperty | difficult to measure
Facets:
value: very
type: DEGREE
Source sentences:
text: Electron affinities are difficult to measure.
text: The electron affinities of atoms are difficult to measure, hence values are available for only a few chemical elements, chiefly the halogens.
text: Electron affinities are measured on atoms in the gaseous state and are very difficult to measure accurately.