Assertion: astatine | /r/IsA | metalloid
Facets:
value: usually
type: DEGREE
value: often
type: TEMPORAL
value: although
type: OTHER
Source sentences:
text: Astatine is usually classified as either a nonmetal or a metalloid; metal formation has also been predicted.
text: The listing tries to show that astatine, although classified as a metalloid is sometimes instead classified as nonmetal (due to the instinctive presumption that because astatine is a halogen it must be a nonmetal).
text: Astatine is usually classified as either a nonmetal or a metalloid; metal formation has also been predicted.
text: However, going down group 17, the metallicity of the elements increases; for example, iodine already exhibits a metallic luster in the solid state, and astatine is often classified as a metalloid due to its properties being quite far from those of the four previous halogens.