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Questions and Answers
Which of the following best describes a pure substance?
Which of the following best describes a pure substance?
Which of the following is an example of a pure substance?
Which of the following is an example of a pure substance?
What is the difference between an element and a compound?
What is the difference between an element and a compound?
Which of the following is an example of a compound?
Which of the following is an example of a compound?
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How can matter be classified according to its composition?
How can matter be classified according to its composition?
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Study Notes
Pure Substances
- A pure substance is a type of matter that has a fixed composition and uniform properties.
- Its properties are not dependent upon the way it was made.
- Examples of pure substances include elements and compounds.
Examples of Pure Substances
- Pure substances are only made up of one type of particle
- A glass of pure water is an example of a pure substance
- An element such as gold is also a pure substance
Difference Between Elements and Compounds
- Elements are the simplest pure substance
- Elements are made up of only one type of atom
- Compounds are made up of two or more elements chemically combined in a fixed ratio
- Compounds can be broken down into simpler substances by chemical means
Examples of Compounds
- Compounds are made up of two or more different kinds of atoms bonded together
- Water (H2O) is a compound made up of hydrogen and oxygen atoms
- Salt (NaCl) is another example, made up of sodium and chlorine atoms
Classification of Matter
- Matter can be classified based on its composition, or what it's made of
- Matter can be a pure substance or a mixture
- Mixtures are made up of two or more substances that are not chemically combined
- Pure substances can be elements or compounds
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Description
Test your knowledge on pure substances and mixtures with this quiz. Learn about the characteristics and properties of pure substances and how they differ from mixtures. Explore the concept of elements and compounds and their role in creating pure substances.
