Assertion: symbol | /r/AtLocation | use
Facets:
value: no longer
type: TEMPORAL
value: within the scientific community
type: LOCATION
Source sentences:
text: The symbols for the named isotopes of hydrogen, deuterium (D), and tritium (T) are still in use today, as is thoron (Tn) for radon-220 (though not actinon; An is usually used instead for a generic actinide).
text: The symbols for isotopes of elements other than hydrogen and radon are no longer in use within the scientific community.
text: In the 19th century, symbols for the major asteroids were also in use, including Vesta (an altar with fire on it; ⚶ U+26B6), Juno (a sceptre; ⚵ U+26B5), Ceres (a reaper's scythe; ⚳ U+26B3), Pallas (⚴ U+26B4); Encke (1850) has further symbols for Astraea, Hebe, Iris, Flora and Metis.