Classification of matter

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What is a heterogeneous mixture?

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

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What is a homogeneous mixture?

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

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What is an element?

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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.

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What is a compound?

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A compound is a pure substance formed when two or more elements chemically combine in fixed proportions.

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What are pure substances?

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Pure substances are materials that have a constant composition and distinct properties. They can be classified into elements and compounds.

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What is the periodic table?

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The periodic table is a tabular arrangement of elements, organized by increasing atomic number, where elements are grouped based on similar properties.

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What is the difference between a mixture and a pure substance?

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A mixture contains two or more substances that are physically combined, while a pure substance has a uniform and definite composition.

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Can you give an example of a heterogeneous mixture?

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

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Can you give an example of a homogeneous mixture?

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An example of a homogeneous mixture is saltwater, where the salt is completely dissolved and cannot be distinguished from the water.

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What is the significance of the chemical formula in compounds?

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The chemical formula indicates the types and numbers of atoms in a compound, providing essential information about its composition.