Aluminum has a density of 2.7 grams per milliliter. An element in the boron group, aluminum is a very light metal, but it is dense enough to sink in water. It is the third most abundant element in the Earth’s crust and is the most abundant metal overall.
The density of an element, especially a metal like aluminum, is an important factor when considering it for use in a project. Density is the mass per unit volume of a given element. A pure element's density can be identified by its mass concentration, as well. The number is the same for both in this case.
Density is just one of the physical properties of aluminum. The metal is soft and ductile with a silvery appearance. These attributes make it suitable for everyday applications such as foil for cooking. It is not flammable, which makes it perfect for cooking foods in the oven or on a grill. The low density of the material allows the heat to easily penetrate to cook the foods without burning them or even allowing flames to directly touch them. Aluminum is also common in duct work. The malleability of the metal makes it ideal for bending around the corners and tight areas in buildings or homes.
While pure aluminum is too soft, adding small amounts of other elements, such as copper, increases its strength to allow it to be useful. Aluminum is toxic to plants and may be toxic to animals in large amounts.