Which of the following elements has an atomic mass of 106.42?

• A. Rhodium (Rh)
• B. Cadmium (Cd)
• C. Palladium (Pd)
• D. Silver (Ag)

Answer: (C)

Verified step by step guidance

1. Understand that the atomic mass of an element is the weighted average mass of the isotopes of that element, measured in atomic mass units (amu).
2. Recall or look up the atomic masses of the given elements: Rhodium (Rh), Cadmium (Cd), Palladium (Pd), and Silver (Ag).
3. Compare the atomic masses of each element to the given value of 106.42 amu.
4. Identify which element's atomic mass matches or is closest to 106.42 amu.
5. Confirm that Palladium (Pd) has an atomic mass of approximately 106.42 amu, making it the correct answer.