Assertion: alkali metal | /r/CapableOf | comprise the group 1 elements
Facets:
value: in the modern iupac nomenclature
type: OTHER
value: excluding hydrogen
type: OTHER
Source sentences:
text: In the modern IUPAC nomenclature, the alkali metals comprise the group 1 elements, excluding hydrogen (H), which is only nominally considered a group 1 element.