number of entities, \(N\)

https://doi.org/10.1351/goldbook.N04266
Integer number obtained by counting of entities, which are usually @M04002@ atoms or @I03158@.
Sources:
Green Book, 2nd ed., p. 39 [Terms] [Book]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 985 [Terms] [Paper]