Assertion: calcium | /r/HasAspect | two valence electrons
Facets:
value: like the other elements
type: OTHER
value: in the outermost s-orbital
type: LOCATION
value: in this case
type: TEMPORAL
Source sentences:
text: Like the other elements placed in group 2 of the periodic table, calcium has two valence electrons in the outermost s-orbital, which are very easily lost in chemical reactions to form a dipositive ion with the stable electron configuration of a noble gas, in this case argon.