Question

This element is bonded to two oxygen and two chlorine atoms in a compound that, like bromine, is a volatile red-brown (20[1])liquid (20[1])at room temperature. (20[1])Only this element is antiferromagnetic at room temperature. An anion (0[1])with seven oxygen atoms contains two atoms of this metal (20[2])in its (20[1])+6 (20[2]0[1])oxidation (20[3]0[3])state, (20[4]0[1])which (20[1])is also found in a common yellow pigment. Ions of (0[1])this element in (*) corundum cause the red color (10[1])of ruby. (10[2])This is (0[1])the first element (0[1])to violate the aufbau principle, (10[1]0[1])since its electron configuration (0[2])is "argon 3d5 4s1." (0[1])This transition metal's main industrial uses are a namesake decorative electroplating process (10[2])and its addition to (10[1])stainless steel. (10[1])For 10 points, name this element with atomic number 24 (10[2])and symbol Cr. (10[2])■END■ (10[8]0[1])

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