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How many protons, neutrons and electrons are there in a neutral atom of the isotope of gallium named gallium-71?

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Answer:

31 protons, 31 electrons, 40 protons.

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

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