Question
An atom of gold with 79 protons, 79 electrons, and 118 neutrons would have a mass number of
Responses
39
39
158
158
197
197
276
276
Responses
39
39
158
158
197
197
276
276
Answers
GPT-4o mini
The mass number of an atom is the sum of the number of protons and neutrons in its nucleus. For an atom of gold with 79 protons and 118 neutrons, the mass number can be calculated as follows:
\[
\text{Mass number} = \text{Number of protons} + \text{Number of neutrons}
\]
\[
\text{Mass number} = 79 + 118 = 197
\]
Thus, the mass number of the atom of gold you described is **197**.
\[
\text{Mass number} = \text{Number of protons} + \text{Number of neutrons}
\]
\[
\text{Mass number} = 79 + 118 = 197
\]
Thus, the mass number of the atom of gold you described is **197**.