question_answer

Write the electronic configuration of (i)\[M{{n}^{4+}}\] (ii)\[F{{e}^{3+}}\] (iii)\[C{{r}^{2+}}\] and (iv)\[Z{{n}^{2+}}\]. Report the number of unpaired electrons in each case.

Answer:

                        Species Electronic configuration No. of unpaired electrons (i) \[M{{n}^{4+}}(Z=25)\]   \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}\,3{{d}^{3}}\] 3 (ii) \[F{{e}^{3+}}(Z=26)\]   \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}\,3{{d}^{5}}\] 5 (iii) \[C{{r}^{2+}}\,(Z=24)\]   \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}\,3{{d}^{4}}\] 4 (iv) \[Z{{n}^{2+}}\,(Z=30)\]   \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\,3{{s}^{2}}3{{p}^{6}}\,3{{d}^{10}}\] 0