What is the Difference Between Boron and Aluminium

The main difference between boron and aluminium is that boron is a metalloid, while aluminum is a metal.

Boron and aluminum are two essential elements with diverse applications and properties. Boron, a metalloid, and aluminum, a lightweight metal, play significant roles in various industries.

Key Areas Covered

1. What is Boron  
      – Definition, Features, Role
2. What is Aluminium
      – Definition, Features, Role
3. Similarities Between Boron and Aluminium
      – Outline of Common Features
4. Difference Between Boron and Aluminium
      – Comparison of Key Differences
5. FAQ: Boron and Aluminium
      – Frequently Asked Questions

Key Terms

Boron, AluminiumDifference Between Boron and Aluminium - Comparison Summary

What is Boron

Boron, a non-metallic element with atomic number 5, exhibits a unique chemistry that distinguishes it from neighboring elements on the periodic table. Its electron configuration (1s² 2s² 2p¹) places it in Group 13, making it a metalloid with properties that bridge the characteristics of metals and non-metals.

One of boron’s distinctive features is its ability to form a variety of compounds, often featuring strong covalent bonds. Boron compounds commonly include borates, which are salts or esters of boric acid. Boric acid itself, H₃BO₃, is a weak acid that behaves as a Lewis acid, readily accepting electron pairs. Its versatility is evident in its involvement in the synthesis of complex organic compounds and as a component in boron-containing drugs.

Boron vs Aluminium

Boron’s electron deficiency leads to its ability to form electron-deficient compounds, such as boron trifluoride (BF₃), which serves as a Lewis acid catalyst in various chemical reactions. Additionally, boron-nitrogen compounds, like borazine (B₃N₃H₆), share structural similarities with benzene, highlighting boron’s capacity to mimic carbon in certain molecular arrangements.

In materials science, boron is crucial for the development of boron fibers and boron carbide, known for their exceptional strength and hardness. Boron’s incorporation into semiconductor technology enhances the performance of electronic devices due to its unique electronic properties.

Furthermore, boron’s role in biological systems has gained attention. It is an essential micronutrient for plants, playing a vital role in cell wall structure. In humans, boron is believed to contribute to bone health and may influence various physiological processes.

What is Aluminium

Aluminium, a versatile metal with the atomic number 13 and symbol Al, is a key element in the Earth’s crust. Aluminium is highly reactive, yet its surface forms a thin, protective oxide layer upon exposure to air, preventing further corrosion. This passive oxide layer, primarily composed of Al2O3, contributes to aluminium’s exceptional resistance to rust and corrosion.

The extraction of aluminium from its ore, bauxite, involves an electrolytic process called the Hall-Héroult process. In this method, aluminium oxide is dissolved in molten cryolite and subjected to electrolysis. The process consumes a substantial amount of energy due to the high melting point of aluminium oxide.

Compare Boron and Aluminium

The metal’s lightweight nature, combined with its strength and durability, makes it a favored material in various applications, especially in the aerospace and automotive industries. Aluminium alloys, formed by combining aluminium with other elements like copper, magnesium, or silicon, enhance its mechanical properties, allowing for tailored applications.

Furthermore, aluminium’s chemical properties make it an excellent conductor of electricity, and it is commonly used in electrical transmission lines and components. Its reflective surface and resistance to corrosion also make it a popular material for household items like foil and cans.

Despite its numerous advantages, aluminium does pose environmental concerns, particularly in terms of extraction and energy consumption. Efforts are ongoing to develop more sustainable methods for aluminium production, such as recycling, which not only conserves resources but also requires significantly less energy compared to primary extraction.

Similarities Between Boron and Aluminium

  • Boron and aluminium have a metallic nature.
  • Both have three valance electrons.

Difference Between Boron and Aluminium


Boron has an atomic number of 5 and is represented by the symbol B, while aluminum has an atomic number of 13 and is represented by the symbol Al.


Boron is a metalloid, while aluminum is a metal.

Atomic Mass

Generally, boron has a lower atomic mass compared to aluminum.

Found in

Boron is often found in nature as borates, while aluminum is one of the most abundant elements in the Earth’s crust and is commonly found in various minerals such as bauxite.

FAQ: Boron and Aluminium

Is boron more reactive than carbon?

No, boron is less reactive than carbon.

Is boron lighter than aluminium?

Yes, boron is lighter than aluminium

Which is more reactive boron or aluminum?

Aluminum is more reactive than boron.


Boron has an atomic number of 5 and is represented by the symbol B, while aluminum has an atomic number of 13 and is represented by the symbol Al. The main difference between boron and aluminium is that boron is a metalloid, while aluminum is a metal.


1. “Boron.” Byju’s.
2. “Aluminum.” Encyclopedia Britannica.

Image Courtesy:

1. “Boron R105” By James L Marshall – “Walking Tour of the Elements” CD and “Rediscovery of the Elements” DVD, ISBN 978-0-615-30795. Courtesy of Dr James L Marshall, University of North Texas, (CC BY-SA 3.0) via Commons Wikimedia
2. “Aluminium” By Unknown author – (CC BY 3.0) via Commons Wikimedia

About the Author: Hasini A

Hasini is a graduate of Applied Science with a strong background in forestry, environmental science, chemistry, and management science. She is an amateur photographer with a keen interest in exploring the wonders of nature and science.

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