Assertion: cerium | /r/HasProperty | metallic chemical element
Facets:
value: in group iiib of periodic table
type: LOCATION
Source sentences:
text: Cerium is a metallic chemical element in group IIIb of periodic table; symbol Ce, soft, lustrous, ductile, iron-color metal with hexagonal or cubic crystalline structure; atomic number 58; atomic mass 140.12; melting point ca 799 C; boiling point ca 3,426 C; specific gravity 6.77 g/cm3 at 25 C; oxidation state +3 or +4; electronic config.
text: Cerium is a metallic chemical element in group IIIb of periodic table; symbol Ce, soft, lustrous, ductile, iron-color metal with hexagonal or cubic crystalline structure; atomic number 58; atomic mass 140.12; melting point ca 799 C; boiling point ca 3,426 C; specific gravity 6.77 g/cm3 at 25 C; oxidation state +3 or +4; electronic config.