An atom of Gold contains 120 neutrons. What is its mass number?

asked Feb 21, 2023 80.1k views

2 votes

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3 votes

Answer:

199

Step-by-step explanation:

Au has atomic number of 79

so mass number = 79 + 120 = 199

Parsa Mousavi answered Feb 25, 2023

3.0k points

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