Element Compound Mixture Test

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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 hydrogen (H), oxygen (O), and gold (Au).

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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. Examples include water (H2O) and carbon dioxide (CO2).

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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. Mixtures can be homogeneous (uniform composition) or heterogeneous (distinct parts).

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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. An example is saltwater, where the salt is evenly distributed.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the components are not uniformly distributed. An example is a salad, where you can see the different ingredients.

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What is a pure substance?

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A pure substance is a material that has a constant composition and properties throughout. Elements and compounds are both considered pure substances.

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How can you identify a compound?

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A compound can be identified by its chemical formula, which shows the elements present and their ratios, such as H2O for water.

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What does it mean if an element symbol has no subscript?

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If an element symbol has no subscript, it means there is only one atom of that element present.

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What is the difference between an element and a compound?

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An element consists of only one type of atom, while a compound consists of two or more different types of atoms bonded together.

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What is a solution?

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A solution is a type of homogeneous mixture where one substance (the solute) is dissolved in another (the solvent). An example is sugar dissolved in water.