Aluminum

Aluminum is a chemical element with the symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. By mass, aluminum makes up about 8% of the Earth's crust, making it the third most abundant element after oxygen and silicon.

Properties of Aluminum

• Physical Properties: Aluminum is a lightweight metal with a density lower than that of other common metals, such as iron, copper, and brass. It has a low melting point and is malleable, making it easy to work with.
• Chemical Properties: Aluminum is highly reactive and can react with oxygen to form aluminum oxide, which gives it a protective layer against corrosion. It also reacts with acids, releasing hydrogen gas.

Uses of Aluminum

Aluminum is a versatile metal with a wide range of applications, including:

• Transportation: Used in the construction of cars, airplanes, and other vehicles due to its lightweight nature.
• Packaging: Widely used in the packaging industry for cans, foils, and other food and beverage containers.
• Construction: Utilized in the construction of buildings and infrastructure due to its strength and corrosion resistance.
• Electrical Transmission: Used in power lines and electrical wiring due to its conductivity and low cost.

Study Guide

Here are some key points to remember when studying the topic of aluminum:

1. What is the chemical symbol and atomic number of aluminum?
2. What are the physical properties of aluminum?
3. How does aluminum react with oxygen and acids?
4. What are some common uses of aluminum?
5. What makes aluminum a suitable material for transportation and construction?