[单选题]
Atoms with the same atomic numb e0-up( lgug5t8-jypter but with different p nynt,fpi 9mr9e* 8 dvo/+oeb- ab-o:numbers of neutrons are referred to asoe *y rap99/bo t+f-p-edbi,m8n: nvo
A. nucleons.
B. nuclides.
C. isotopes.
D. none of the given answers
