[单选题]
Atoms with the same atomic number but with dpk.*f++ u scp6q,rhu9pu: 8tsu v6dpfifferent numbers of neut+x63 pyp/sd va00by ulqxy o-)rons are referred tq p-vp+sydx/lay0x6y ou0 b) 3o as
A. nucleons.
B. nuclides.
C. isotopes.
D. none of the given answers
