Elements, Mixtures and Compounds

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What is a colloid?

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A colloid is a mixture where tiny particles of one substance are evenly distributed throughout another substance, such as milk.

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What is an element?

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An element is a pure substance that cannot be separated into simpler substances by chemical or physical means, consisting of only one kind of atom.

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What is a suspension?

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A suspension is a heterogeneous mixture in which solid particles are suspended in a liquid or gas, like Italian dressing.

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What is a solution?

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A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent), such as salt water.

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What is a compound?

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A compound is a substance formed when two or more elements are chemically bonded together, like water (H2O).

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What is a mixture?

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A mixture is a combination of two or more substances that are not chemically bonded, such as sand and salt.

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What is the difference between a homogeneous and heterogeneous mixture?

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A homogeneous mixture has a uniform composition throughout (like salt water), while a heterogeneous mixture has a non-uniform composition (like a salad).

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Can elements be broken down into simpler substances?

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No, elements cannot be broken down into simpler substances by chemical or physical means.

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What is an example of a colloid?

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An example of a colloid is milk, which contains fat droplets dispersed in water.

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What is an example of a compound?

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An example of a compound is carbon dioxide (CO2), which consists of carbon and oxygen atoms.