The ion of an element has 3 positive charges. A mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
The number of protons in an atom= Mass number- the number of neutrons. Therefore, an element has 13 protons and 13 electrons. To become a positive ion with 3 positive charges the atom will have to lose 3 electrons. Hence, the number of remaining electrons in the ion will be 10.