Questions and Answers
What is a compound?
What is an element?
What is a mixture?
What defines a heterogeneous mixture?
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What is a colloid?
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What is a suspension?
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List three differences between a compound and a mixture.
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List three differences between a compound and an element.
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Give three examples of a heterogeneous mixture.
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Give three examples of a homogeneous mixture.
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What is a solution?
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What defines a homogeneous mixture?
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Study Notes
Chemistry and Matter Terminology
- Compound: Formed through a chemical combination of two or more substances.
- Element: A substance made exclusively of one type of atom; examples include Carbon, Oxygen, and Neon.
- Mixtures: Created from a physical combination of two or more substances.
Types of Mixtures
- Heterogeneous Mixtures: Composition is not uniform; can be further categorized as colloids or suspensions.
- Colloid: Contains medium-sized particles, exhibits the Tyndall effect (scattering light), and particles remain suspended. Example: milk.
- Suspension: Composed of larger particles, also displays the Tyndall effect, but particles eventually settle out. Example: fresh-squeezed lemonade.
Differences between Compounds and Mixtures
- Chemical vs. Physical Combination: Compounds arise from a chemical combination, while mixtures involve physical combinations of substances.
- Identity Retention: Compounds do not retain the identities of the original components; mixtures preserve the properties of their individual substances.
- Separation Methods: Compounds can only be separated through chemical means; mixtures can be separated physically.
Differences between Compounds and Elements
- Composition: Compounds consist of two or more elements; elements contain only one type of atom.
- Decomposition: Compounds can be chemically decomposed; elements cannot be broken down further.
- Formation Ratio: Compounds form in a definite ratio; the formation of elements does not depend on specific ratios.
Examples of Mixtures
- Heterogeneous Mixtures: Include milk, paint, and rocks.
- Homogeneous Mixtures: Examples consist of apple juice, rubbing alcohol, and soda.
Solutions
- Solution: A type of homogeneous mixture with very small particles that do not scatter light (no Tyndall effect) and do not settle. Example: rubbing alcohol.
- Homogeneous Mixture: The composition is uniform throughout and is also referred to as a solution.
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Description
Test your knowledge on the fundamental terms in chemistry related to compounds, elements, and mixtures. This quiz covers the differences between heterogeneous mixtures, colloids, and suspensions, as well as the nature of chemical and physical combinations. Challenge yourself and enhance your understanding of matter in chemistry!