Assertion: salt's potassium | /r/HasProperty | one of the alkali metals
Facets:
value: in the periodic table
type: LOCATION
Source sentences:
text: In the periodic table, potassium is one of the alkali metals, all of which have a single valence electron in the outer electron shell, that is easily removed to create an ion with a positive charge – a cation, that combines with anions to form salts.