A certain radionuclide is used to diagnose lymphoma. An atom of this radionuclide contains 31 protons and 36 neutrons. Which statement is correct about the radionuclide?
Answer
A
The atomic number is 67 , the mass number is 31 , and its symbol is 31 to the 67th power Ga.
B
The atomic number is 67 , the mass number is 31 , and its symbol is 67 to the 31th power Ga.
C
The atomic number is 31 , the mass number is 67 , and its symbol is 31 to the 67th power Ga.
D
The atomic number is 31 , the mass number is 67 , and its symbol is 67 to the 31th power Ga.