Multiple choice Identify the mismatched pair of element and its electronic configuration. Cu: [Ar] 3d10 4s1 Ag: [Kr] 4d10 5s1 Au: [Xe] 5d10 6s1 Zn: [Ar] 3d10 4s2 Pt: [Xe] 4f14 5d9 6s1 Reveal answer Fill a bubble to check yourself C Correct answer Explanation The correct electronic configuration of gold (79Au) is [Xe] 4f14 5d10 6s1.