question_answer 44)

  Identify the Mg2+ ion from the figure where, n and p represent the number of neutrons and protons respectively.

Answer:

  (d) K, L, M                    Electronic configuration atom = 2, 8, 2 and that of          Number of protons in Mg atom=2 + 8+ 2 =12               Number of neutrons in Mg atom =24-12 = 12             as mass number of Mg atom =24 and number of neutrons . = mass number - number of protons]      Therefore, option (d) is the correct answer.