Assertion: metal's state | /r/CapableOf | grow in importance
Facets:
value: from carbon
type: OTHER
value: to lead
type: PURPOSE
Source sentences:
text: Lastly, because of the increasing energy gap between the valence s and p orbitals as the group is descended, the divalent state grows in importance from carbon to lead, so that a few unstable divalent compounds are known for silicon; this lowering of the main oxidation state, in tandem with increasing atomic radii, results in an increase of metallic character down the group.