Assertion: astatine | /r/HasProperty | halogen
Facets:
value: in 1950
type: TEMPORAL
value: collectively
type: MANNER
Source sentences:
text: My impression is that the jury is still out on their work (see the second external link: Astatine: Halogen or Metal?) although Google is showing 7 citations to date, with no dissenters that I can see.
text: The five elements; Fluorine (F), Chlorine (Cl), Bromine(Br), Iodine (I) and Astatine (At) belonging to VII A Group of the modern periodic table are collectively referred as halogens.
text: In 1950 astatine was described as a halogen and (therefore) a reactive nonmetal.
text: Since both Astatine and Iodine are Halogens they would share some of the same properties, because they each have seven valence electrons.
text: Astatine is a halogen and possibly accumulates in the thyroid like iodine.
text: Astatine is a halogen, and precautions are necessary.
text: Astatine is a halogen and a nonmetal Color:
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 a halogen
text: Astatine is a halogen and possibly accumulates in the thyroid like iodine.
text: Furthermore Astatine, being a halogen, is said to accumulate in the thyroid region.
text: Astatine is a halogen which has no stable isotopes.