Answer:
Bismuth will have more of protons.
Step-by-step explanation:
Atomic number of an element is equal to number of protons.
The atomic number of lead = 82, so the number of protons = 82
The atomic number of bismuth = 83, so the number of protons =83
The mass number = number of protons + number of neutrons
As given that mass number of each of the elements is same.
As the number of protons of bismuth is more than leas, the number of neutrons in bismuth will be less than lead.