Answer :
The isotope Gold-195 has 79 protons, 116 neutrons, and 79 electrons, which corresponds to answer choice (a).
The isotope Gold-195 contains a specific number of protons, neutrons, and electrons. By definition, the number of protons corresponds to the atomic number of gold, which is 79. The number of electrons in a neutral atom is equal to the number of protons, so gold also has 79 electrons. To find the number of neutrons, we subtract the atomic number from the mass number (which is the sum of protons and neutrons). For Gold-195, that would be 195 - 79 = 116 neutrons. So the correct answer is (a) 79 protons, 116 neutrons, 79 electrons.
Final answer:
The isotope Gold-195 has 79 protons, 116 neutrons, and 79 electrons; this configuration corresponds to answer choice a).
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
