Elements, Compounds and Mixtures

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically combine in a fixed ratio, resulting in new chemical properties.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties and can be separated by physical means.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, meaning the different components are not distinguishable.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the components are not uniformly distributed, and different parts can be seen and separated.

Front

Why is saltwater considered a mixture?

Back

Saltwater is considered a mixture because it is composed of two or more substances (salt and water) that retain their own chemical properties.

Front

What happens when sugar dissolves in water?

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When sugar dissolves in water, it forms a homogeneous mixture, where the sugar molecules are evenly distributed throughout the water.

Front

What is the difference between a compound and a mixture?

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A compound is formed by the chemical combination of elements, resulting in new properties, while a mixture is a physical combination of substances that retain their individual properties.

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Can a mixture be separated by physical means?

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Yes, mixtures can be separated by physical means such as filtration, evaporation, or distillation.

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What is an example of a heterogeneous mixture?

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An example of a heterogeneous mixture is a salad, where the individual ingredients can be seen and separated.