Question

What is the charge of Aluminum with a mass number of 27 and atomic number of 13?

Answer 1

Aluminum (Al) with an atomic number of 13 has 13 protons in its nucleus. In its most common form, aluminum is neutral, meaning it has an equal number of protons and electrons. Therefore, a neutral aluminum atom has 13 electrons.

However, aluminum frequently forms ions. The most common ion it forms is Al³⁺, which means it has lost three electrons, resulting in a positive charge of +3.

So, while the charge of a neutral aluminum atom is 0, when it forms its most common ion, the charge is +3.