Assertion: polonium | /r/IsA | metalloid
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Because of its position in the periodic table, polonium is sometimes classified as a metalloid.
text: Polonium is sometimes considered to be a metal, but is also sometimes classified a metalloid (an element with features of both metal and non-metal) because of its position on the periodic table.
text: Because of its position in the periodic table, polonium is sometimes classified as a metalloid.