How many neutrons does a silver atom with a mass number of 108 have?

• A. 47
• B. 54
• C. 108
• D. 61

Answer: (D)

Verified step by step guidance

1. Identify the atomic number (Z) of silver, which is the number of protons. For silver, Z = 47.
2. Understand that the mass number (A) is the total number of protons and neutrons in the nucleus. Here, A = 108.
3. Recall the relationship: \(A = Z + N\), where \(N\) is the number of neutrons.
4. Rearrange the formula to solve for neutrons: \(N = A - Z\).
5. Substitute the known values: \(N = 108 - 47\), which gives the number of neutrons in the silver atom.