Assertion: tritium's symbol | /r/ObjectUse | used c
Facets:
value: for carbon
type: PURPOSE
value: for standard notation
type: PURPOSE
Source sentences:
text: When a chemical symbol is used, e.g. "C" for carbon, standard notation (now known as "AZE notation" because A is the mass number, Z the atomic number, and E for element) is to indicate the mass number (number of nucleons) with a superscript at the upper left of the chemical symbol and to indicate the atomic number with a subscript at the lower left (e.g. 3