Compounds, Mixtures, Elements

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What is a compound?

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A compound is a substance formed when two or more different elements are chemically bonded together. Example: H₂O (water) is a compound made of hydrogen and oxygen.

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What is an element?

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An element is a pure substance that consists of only one type of atom. Examples include gold (Au), oxygen (O), and carbon (C).

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What is a mixture?

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A mixture is a combination of two or more substances where each retains its own properties. Example: A salad is a mixture of different vegetables.

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What is the difference between a compound and a mixture?

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A compound is a chemical combination of elements, while a mixture is a physical combination of substances that can be separated.

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What are some examples of elements?

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Examples of elements include hydrogen (H), oxygen (O), carbon (C), and iron (Fe).

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What are some examples of compounds?

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Examples of compounds include water (H₂O), carbon dioxide (CO₂), and sodium chloride (NaCl).

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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. Example: Saltwater is a homogeneous mixture.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the components are not uniform and can be easily distinguished. Example: A bowl of fruit salad.

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What happens when elements combine to form a compound?

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When elements combine to form a compound, they undergo a chemical reaction, resulting in a new substance with different properties.

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Can compounds be separated into their elements?

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Yes, compounds can be separated into their elements through chemical reactions, such as electrolysis.