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

Correct answer: 10

Explanation: The ion has 10 electrons after losing 3 from its neutral atomic state. 📚 Other Information: ▪️ Mass number = 27, neutrons = 14 → protons = 13. ▪️ Neutral atom: protons (13) = electrons (13). ▪️ Losing 3 electrons → 13 – 3 = 10 electrons. ▪️ Hence, the ion is Al³⁺ (Aluminium ion). ▪️ Commonly used in electrolysis and metallurgy. ▪️ Aluminium compounds are amphoteric. ▪️ Found in bauxite ore. ▪️ Plays role in packaging (foil, cans) and transport (aircraft).