Assertion: astatine | /r/HasProperty | prepared
Facets:
value: according to the general equation
type: OTHER
value: usually
type: DEGREE
Source sentences:
text: Astatine is usually prepared according to the general equation: which indicates that bismuth-209 takes up one alpha particle and emits x neutrons to form an isotope of astatine, whose atomic weight depends on the number of neutrons lost.