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Learn how elements and compounds are different

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Table salt is made from a compound called sodium chloride

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Compounds

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A compound is a substance that is made of two or more elements chemically combined.

Compounds do not have the same properties as the elements they are made of.

Compounds:

different from their elements

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Table salt, or sodium chloride is a compound. It is made of two different elements, sodium and chlorine.

Salt is safe for us to eat, and we use it to season our food.

Let's look at the elements that make up the salt that we eat.

Sodium

Sodium is a metal and is very reactive. It can explode if it comes in contact with water.

Source: https://www.youtube.com/watch?v=5UsRiPOFLjk

Chlorine

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Chlorine is a gas that is greenish yellow in colour. It is a toxic gas and can cause death.

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Below are some examples of common compounds and their elements:

carbon dioxide is a compound made from the elements carbon and oxygen

water is a compound made from the elements hydrogen and oxygen

sugar is a compound made from the elements carbon, hydrogen and oxygen

Water is made of elements of hydrogen and oxygen

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In the next module, we will look at mixtures.