An aluminum atom is an atom of the element aluminum, which is a chemical element with the symbol Al and atomic number 13. It is the third most abundant element after oxygen and silicon in the Earth's crust, and is notable for its low density, high strength, and excellent corrosion resistance.

An aluminum atom has 13 protons in its nucleus, surrounded by 13 electrons. The electrons are arranged in three shells around the nucleus, with two electrons in the first shell, eight electrons in the second shell, and three electrons in the third shell. The outermost shell is known as the valence shell, and the three valence electrons are responsible for the chemical properties of aluminum.

Aluminum is a highly reactive element, and readily forms bonds with other elements. It is commonly found in nature as a compound, such as aluminum oxide (Al2O3), which is also known as alumina. Aluminum is also found in many minerals, including bauxite, cryolite, and diaspore.

Aluminum is an important industrial metal, and is used in a wide variety of applications. It is lightweight, strong, and resistant to corrosion, making it an ideal material for use in construction, transportation, and packaging. Aluminum is also used in the production of electrical components, such as capacitors and semiconductors, as well as in the manufacture of food and beverage cans.