Question

Ion of an element has three positive charges and the mass number of atom is 27 and no. of nutron is 14.what is the number of electron in the ion​

Answer 1

Answer:

From mass number and number of neutrons, we can calculate number of protons or electrons which is 13 (mass number -  number of neutrons). Hence, the electronic configuration of this element would be 2, 8, 3. In order to become stable it would lose the last 3 electrons and gain 3 positive charges as given in the question. So, the resultant ion is left with 10 electrons. The element here is Al (aluminium).

Hence correct option is (B).

Explanation: