Aluminum

Aluminum is a chemical element with the symbol Al and atomic number 13. It is a silvery-white, soft, non-magnetic and 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.

Physical and Chemical Properties

Here are some key physical and chemical properties of aluminum:

• Atomic number: 13
• Atomic mass: 26.9815 u
• Melting point: 660.32°C
• Boiling point: 2519°C
• Density: 2.70 g/cm³
• Conductivity: Good conductor of heat and electricity

Uses of Aluminum

Aluminum has a wide range of practical applications due to its unique properties. Some common uses of aluminum include:

• Manufacture of aircraft and aerospace components
• Production of household items such as foil, cans, and kitchen utensils
• Construction of vehicle parts and transportation infrastructure
• Electrical transmission lines and conductors

Study Guide

Here are some key points to remember when studying aluminum:

1. What is the atomic number of aluminum?
2. What are the physical properties of aluminum?
3. What are the common uses of aluminum?
4. Why is aluminum a good choice for aircraft manufacturing?
5. How does aluminum compare to other metals in terms of density and conductivity?

Understanding the properties and uses of aluminum is important for various fields including chemistry, engineering, and materials science.