Assertion: astatine | /r/HasProperty | believed
Facets:
Source sentences:
text: It is believed that this highly radioactive element might accumulate in the thyroid gland like iodine.
text: It is believed that the metal accumulates in the thyroid gland similar to iodine.
text: Astatine is found in only vanishingly small amounts in nature—it is believed that only 30 grams (1 ounce) of the element are present in Earth's crust at any one time.