Assertion: beryllium's electron | /r/HasProperty | excited by x-ray absorption
Facets:
Source sentences:
text: The amount of X-rays absorbed by an element depends on the size of its atoms (its absorption cross-section, specifically, as affected by the size of core orbitals that contain electrons that can be excited by X-ray absorption, and the number of electrons in those orbitals) and how many atoms are packed into a given volume.