Based on the electron configuration exceptions of chromium and copper, predict the behavior of silver (Ag) in terms of electron configuration.

• A. Silver will promote an electron from the 4d orbital to the 5s orbital, resulting in 5s² 4d⁹.
• B. Silver will not promote any electrons, resulting in 5s² 4d⁹.
• C. Silver will promote an electron from the 5p orbital to the 4d orbital, resulting in 5s² 4d¹⁰.
• D. Silver will promote an electron from the 5s orbital to the 4d orbital, resulting in 5s¹ 4d¹⁰.

Answer: (D)