The total number of protons and neutrons in an atom is called
A、theatomicnumber
B、theprotonnumber
C、themassnumber
D、theneutronnumber
E、3
发布时间:2024-09-04 23:31:14
A、theatomicnumber
B、theprotonnumber
C、themassnumber
D、theneutronnumber
E、3