Answer :
Final answer:
Gold has an atomic mass of 197 and an atomic number of 79. The difference between these two numbers gives us the number of neutrons in an atom of Gold, which is 118.
Explanation:
The atomic mass of an element, in this case Gold, is comprised of the combined total number of protons and neutrons within the nucleus. The atomic number represents the total number of protons. To find out how many neutrons gold has, you must subtract the atomic number from the atomic mass. So, using the data for gold, which has an atomic mass of 197 and atomic number of 79, we subtract 79 from 197, which gives us 118. Therefore, the correct answer is Option 3: 118 neutrons.
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