Answer:
31 protons, 31 electrons, 40 protons.
Step-by-step explanation:
If we look in the Periodic Table, we can find that the atomic number of gallium is 31. This means, that gallium has 31 protons.
In a neutral atom, the number of protons (positive charges) is equal to the number of electrons (negative charges). Thus, this isotope has 31 electrons.
In gallium-71, 71 represents the mass number, which is the sum of protons and neutrons. Then, the number of neutrons is:
71 = p + n
n = 71 - p = 71 -31 = 40 neutrons