question_answer

  The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

Answer:

              Number of protons =Atomic number = Mass number ? Number of neutrons = 27 ? 14 = 13 So, the element is aluminium and the number of electrons in the Al atom = 13 Number of electrons in the ion = Number of protons-positive charge = 13 -3 =10 " Positive charge means loss of electrons.