Assertion: metal's oxidation state | /r/HasProperty | stable
Facets:
value: in the presence of ligands
type: OTHER
value: very
type: DEGREE
value: unlike the preceding transition metals
type: OTHER
value: in air
type: LOCATION
Source sentences:
text: The identity of titanium species in aqueous solution remains unknown because of its low solubility and the lack of sensitive spectroscopic methods, although only the 4+ oxidation state is stable in air.
text: The oxidation states are also very stable; with the exceptions of SmI 2  and cerium(IV) salts, lanthanides are not used for redox chemistry.
text: Unlike the preceding transition metals, the +1 oxidation state of silver is stable even in the absence of π-acceptor ligands.
text: The lower oxidation states are stable only in the presence of ligands.