Assertion: atom's valence electron | /r/HasProperty | screened by the core electrons
Facets:
value: appreciably
type: MANNER
Source sentences:
text: The charge \(Z\) of the nucleus of a fluorine atom is 9, but the valence electrons are screened appreciably by the core electrons (four electrons from the 1s and 2s orbitals) and partially by the 7 electrons in the 2p orbitals.