Classifications Of Matter Flashcards
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Questions and Answers

What is an element?

A substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number.

What is a compound?

A substance made up of atoms of two or more different elements joined by chemical bonds.

What constitutes a mixture?

A combination of two or more substances that are not chemically combined.

Define an atom.

<p>The smallest unit of an element that maintains the properties of that element.</p> Signup and view all the answers

What is a molecule?

<p>The smallest unit of substance that keeps all of the physical and chemical properties of that substance.</p> Signup and view all the answers

What is a heterogenous mixture?

<p>A mixture with uneven distribution of different substances; a mixture that is not evenly mixed.</p> Signup and view all the answers

Describe a homogeneous mixture.

<p>A mixture in which the composition is uniform throughout.</p> Signup and view all the answers

What is a pure substance?

<p>A pure substance is made of one type of particle.</p> Signup and view all the answers

What is matter?

<p>Anything that has mass and takes up space.</p> Signup and view all the answers

What are the two types of matter?

<p>Pure substances (elements/compounds) and mixtures (homogeneous mixtures/heterogeneous mixtures).</p> Signup and view all the answers

How do mixtures differ from compounds?

<p>Mixtures are physically mixed and can be separated, while compounds are chemically bonded and cannot be separated by physical means.</p> Signup and view all the answers

What defines a compound?

<p>Two or more elements chemically combined.</p> Signup and view all the answers

Give examples of properties of compounds.

<p>Hydrogen and oxygen; examples include hydrogen peroxide, salt, alcohol, and glucose.</p> Signup and view all the answers

What are the properties of a homogeneous mixture?

<p>They have one phase, are uniform throughout, and have differences between physical properties.</p> Signup and view all the answers

What are the characteristics of a heterogeneous mixture?

<p>Uneven composition.</p> Signup and view all the answers

What is CH4?

<p>A compound.</p> Signup and view all the answers

What is S8?

<p>An element.</p> Signup and view all the answers

What is distilled water classified as?

<p>A compound.</p> Signup and view all the answers

What is salt water?

<p>A homogeneous mixture.</p> Signup and view all the answers

Define CH2O.

<p>A compound.</p> Signup and view all the answers

What is concrete classified as?

<p>A homogeneous mixture.</p> Signup and view all the answers

What is C+O2 classified as?

<p>A heterogeneous mixture.</p> Signup and view all the answers

What is CO?

<p>A compound because if you break it down, the elements are carbon and oxygen.</p> Signup and view all the answers

What is CO2?

<p>A compound because it is composed of two elements which are carbon and oxygen.</p> Signup and view all the answers

What does Co represent?

<p>An element because if there is one uppercase letter, then it is an element.</p> Signup and view all the answers

Study Notes

Classifications of Matter

  • Element: A fundamental substance that cannot be chemically separated into simpler forms. All atoms share the same atomic number.

  • Compound: A substance formed from two or more different elements chemically bonded together.

  • Mixture: A combination of multiple substances that are not chemically bonded, allowing for the separation of components.

  • Atom: The smallest unit of an element that retains the element's characteristics.

  • Molecule: The smallest unit of a substance that preserves all the physical and chemical properties of that substance.

Mixtures

  • Heterogeneous Mixture: A mixture with uneven distribution of components, not uniformly mixed.

  • Homogeneous Mixture: A mixture that appears uniform in composition throughout.

Pure Substances and Types of Matter

  • Pure Substances: Composed of a single type of particle.

  • Two Types of Matter:

    • Pure Substances: Includes elements and compounds.
    • Mixtures: Categorized into homogeneous and heterogeneous mixtures.
  • Mixtures: Composed of two or more components physically mixed, maintaining the original properties of the substances.

Elements and Compounds

  • Elements: Consist of only one type of atom; cannot be simplified by chemical reactions.

  • Properties of Elements: Include both chemical and physical characteristics; examples include Calcium, Copper, Gold, and Nitrogen.

  • Compounds: Combinations of two or more different elements that are chemically combined.

  • Properties of Compounds: Include unique characteristics derived from the elements that make them up; examples include Hydrogen Peroxide, Salt, Alcohol, and Glucose.

Properties of Mixtures

  • Homogeneous Mixture Properties:

    • Consists of one phase
    • Uniform throughout
    • May form a solution
    • Examples: Iced Tea, Stainless Steel, Maple Syrup, Brewed Coffee.
  • Heterogeneous Mixture Properties:

    • Exhibits uneven composition
    • Examples: Orange juice with pulp, Chocolate Chip Cookies, Sandy Water, Chicken Noodle Soup.

Specific Examples

  • CH4 (Methane): Classified as a compound.

  • S8: An example of an element.

  • Distilled Water: Considered a compound comprised of H2O.

  • Salt Water: Defined as a homogeneous mixture due to uniform salt distribution.

  • C + O2: Represents a heterogeneous mixture.

  • CO (Carbon Monoxide): A compound formed from Carbon and Oxygen.

  • CO2 (Carbon Dioxide): Another compound made from the elements Carbon and Oxygen.

  • Co: An element, as indicated by a single capital letter.

Summary of Matter Classification

  • Matter is categorized into two main classifications: Pure substances (elements and compounds) and mixtures (homogeneous and heterogeneous). Understanding these basic definitions and properties is crucial for studying chemistry.

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Explore essential concepts in chemistry with these flashcards on the classifications of matter. Learn about elements, compounds, and mixtures, and understand how substances interact. Perfect for students looking to reinforce their knowledge in chemistry.

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