The completeelectron configurationfor As³⁻ is; 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶. Option C is correct.The correct electron configuration for As³⁻ (the ion ofarsenicwith a charge of -3) is:1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶The electron configuration represents the arrangement of electronsin the energy levels and orbitals of an atom or ion. In the case of As³⁻, we start with the electron configuration of theneutral atomarsenic (As), which is:1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³To form the  As³⁻ ion, threeadditional electronsare gained, filling the 4p orbital completely:1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶Hence, C. is the correct option.To know more aboutelectron configurationherebrainly.com/question/29157546#SPJ4--The given question is incomplete, the complete question is"Give the complete electron configuration for As³⁻. A) 1s²2s²2p⁶3s²3p⁶4s²4p⁶ B) 1s²2s²2p⁶3s²3p⁶4s²4d¹⁰4p⁶ C) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ D) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴ E) 1s²2s²2p⁶3s²p⁶4s²3d¹⁰4p⁶."--...

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