Final answer:
The electron configurations for the provided ions are as follows: Fe²⁺: [Ar] 3d⁶, Al³⁺: [Ne] 3s²3p⁶, Cu⁺: [Ar] 3d¹⁰4s⁰, Ba²⁺: [Xe] 6s², Br⁻: [Kr] 4d⁵5s², O²⁻: [He] 2s²2p⁶
Step-by-step explanation:
The electron configurations for the following ions are as follows:
Fe²⁺: [Ar] 3d⁶
Al³⁺: [Ne] 3s²3p⁶
Cu⁺: [Ar] 3d¹⁰4s⁰
Ba²⁺: [Xe] 6s²
Br⁻: [Kr] 4d⁵5s²
O²⁻: [He] 2s²2p⁶