Assertion: metal's valence electron | /r/HasProperty | free to move
Facets:
value: in this model
type: OTHER
value: always
type: DEGREE
Source sentences:
text: The valence electrons are always free to move when an electrical field is applied.
text: In this model, the valence electrons are free, delocalized, mobile, and not associated with any particular atom.
text: Here the valence electrons are free to move around in a piece of copper metal.