Assertion: alkali metal | /r/HasProperty | reactive
Facets:
value: highly
type: DEGREE
value: because of generally low density
type: CAUSE
value: because of their +1 oxidation state
type: CAUSE
Source sentences:
text: Because they are so reactive, these elements are found in compounds.
text: For our purposes we will define the following ten families: Alkali metals The alkali metals, found in group 1 of the periodic table, are highly reactive metals that do not occur freely in nature.
text: They are highly reactive elements, distinctive because of their +1 oxidation state and generally low density compared to other metals.
text: From left to right in the periodic table, these categories include the highly reactive alkali metals; the less reactive alkaline earth metals, lanthanides and radioactive actinides; the archetypal transition metals, and the physically and chemically weak post-transition metals.