Which element has an atomic mass of 106.42?

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

Answer: (D)

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. Look up the atomic masses of the given elements: Cadmium (Cd), Silver (Ag), Rhodium (Rh), and Palladium (Pd) in a reliable periodic table or reference source.
3. Compare the atomic masses of these elements to the given value of 106.42 amu.
4. Identify which element's atomic mass 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.