Podcast
Questions and Answers
What is a mixture?
What is a mixture?
- Single substance
- Pure substance
- Chemical formula
- Multiple substances (correct)
What defines a pure substance?
What defines a pure substance?
- Different kinds of atoms
- Multiple substances
- Mixture of phases
- Single substance (correct)
Which of the following describes a homogeneous mixture?
Which of the following describes a homogeneous mixture?
- Non-uniform
- Multiple phases
- Same phase (correct)
- Separates easily
Which of the following describes a heterogeneous mixture?
Which of the following describes a heterogeneous mixture?
What is an element?
What is an element?
What are compounds?
What are compounds?
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Study Notes
Classification of Matter
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Mixture
- Composed of multiple substances.
- Contains more than one type of matter, which may vary in composition.
-
Pure Substance
- Consists of only one type of substance.
- Uniform in composition and properties throughout.
Types of Mixtures
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Homogeneous Mixture
- Mixture with the same phase throughout.
- Exhibits uniform composition and properties.
- Examples include salt dissolved in water and alloys like gold mixed with copper.
-
Heterogeneous Mixture
- Mixture containing multiple phases.
- Non-uniform composition, where components do not mix well.
- Examples include a mixture of sand and water or chocolate chip cookies.
Key Entities
-
Element
- A pure substance made up of only one type of atom.
- Identified by a unique chemical symbol, such as carbon (C) or silver (Ag).
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Compounds
- Pure substances formed from different kinds of atoms.
- Represented by a chemical formula, such as carbon dioxide (CO2) and pure water (H2O).
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