text: hi, was just wondering if someone could help me complete this quick question:? complete the electronic configuration of calcium in:  ca(oh)2 = 1s^2 2s^2 2p^6............  thanks in advance,  harry ca(oh)2 would have the electron configuration of  1s^2, 2s^2, 2p^6, 3s^2, 3p^6  because calcium is in the +2 oxidation state from the hydroxyl ligands, the extra 4s^2 electrons are missing. therefore it has a noble gas configuration of argon. hope that helps!