question_answer 35)

Which of the following correctly represent the electronic distribution in the Mg atom? (a) 3, 8, 1                              (b) 2, 8, 2                             (c) 1, 8, 3                              (d) 8, 2,

Answer:

(b) Atomic number and the number of electrons in magnesium atom is 12. So, electronic configuration is 2, 8, 2 (because 12 " 2 + 8 + 2),