Final answer:
The isotope Gold-195 has 79 protons, 116 neutrons, and 79 electrons; this configuration corresponds to answer choice a).
Step-by-step explanation:
The isotope Gold-195 refers to the version of gold containing a total of 195 protons and neutrons. Since gold has an atomic number of 79, which indicates the number of protons in the nucleus, every atom of gold will have 79 protons.
To find the number of neutrons, we subtract the atomic number from the mass number: 195 - 79 = 116 neutrons. In a neutral atom, where there is no net charge, the number of protons is equal to the number of electrons.
Hence, Gold-195 also has 79 electrons. Therefore, the correct answer to the question about the composition of Gold-195 is a) 79 protons, 116 neutrons, 79 electrons.
correct option a) 79 protons, 116 neutrons, 79 electrons