• # question_answer The atomic number of an element 'M' is 26. How many electrons are present in the M-shell of the element in its ${{M}^{3+}}$ state? A)  $11$                                   B)  $15$ C) $14$                                    D)  $13$

 K L M N $M(26)$ $1{{s}^{2}},$ $2{{s}^{2}}2{{p}^{6}},$ $3{{s}^{2}}3{{p}^{6}}3{{d}^{6}}$ $4{{s}^{2}}$ ${{M}^{3+}}$ $1{{s}^{2}},$ $2{{s}^{2}}2{{p}^{6}},$ $3{{s}^{2}}3{{p}^{6}}3{{d}^{5}}$ $4{{s}^{0}}$
Hence, 13 electrons are present in the M-shell of ${{M}^{3+}}$ state.