Kit Library / Science / Chemistry

⚡ Topic Learning Kit

Air and Its Components

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💡 Key Idea

Air Is a Mixture of Gases

Air is not one gas.

Air is a *mixture* of several gases, not a single substance. The main gases are nitrogen (about 78%) and oxygen (about 21%). The remaining 1% includes argon, carbon dioxide, water vapour, and other gases. Because it is a mixture, the gases can be separated by physical means.

↳ Air is a mixture of gases, mainly nitrogen and oxygen.

📖 Definition

What Is Air?

The invisible mixture around us.

Air is the *colourless*, *odourless*, and *tasteless* mixture of gases that surrounds the Earth. It is essential for life. We cannot see air, but we can feel it when it moves as wind.

↳ Air is a colourless, odourless mixture of gases.

⭐ Important Fact

Composition of Air

Two gases make up 99%.

Nitrogen and oxygen together make up about 99% of air. Nitrogen is the most abundant gas at about 78%, and oxygen is about 21%. The remaining 1% is a mix of argon, carbon dioxide, water vapour, and traces of other gases.

↳ Nitrogen and oxygen make up 99% of air.

📖 Smart notes

What you'll study, topic by topic

1

Air and Its Components

Air is the invisible mixture of gases that surrounds Earth and sustains life. It is composed mainly of nitrogen and oxygen, along with small amounts of carbon dioxide, water vapour, and other gases. Understanding air's c…

  • Air is a mixture of gases, not a single substance.
  • The main gases in air are nitrogen (~78%) and oxygen (~21%).
  • Carbon dioxide makes up about 0.03–0.04% of air.

~15 min · full explanation, examples & memory tricks in the app

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