What is the atomic number of aluminium - JAMB Chemistry 2023 Question

The atomic number of an element is the number of protons in the nucleus of an atom of that element.

For aluminium, which has the chemical symbol Al, the atomic number is 13. This means that a neutral aluminium atom has 13 protons in its nucleus.

The atomic number is a fundamental property of an element and determines its place in the periodic table. In the case of aluminium, it is a metal commonly used in various industries due to its lightweight, corrosion resistance, and other favourable properties.