Podcast
Questions and Answers
Which of the following best describes a pure substance?
Which of the following best describes a pure substance?
- A substance that contains multiple kinds of matter
- A substance that has variable properties
- A substance that can be either an element or a compound
- A substance that contains only one kind of matter (correct)
Which of the following is an example of a pure substance?
Which of the following is an example of a pure substance?
- Saltwater
- Sugar (correct)
- Concrete
- Air
What is the difference between an element and a compound?
What is the difference between an element and a compound?
- Elements are pure substances, while compounds are mixtures
- Elements consist of only one kind of atom, while compounds consist of two or more different kinds of atoms (correct)
- Elements are made up of one or more elements, while compounds are made up of only one element
- Elements have fixed properties, while compounds have variable properties
Which of the following is an example of a compound?
Which of the following is an example of a compound?
How can matter be classified according to its composition?
How can matter be classified according to its composition?
Flashcards
Pure Substance - Definition
Pure Substance - Definition
A substance containing only one kind of matter.
Pure Substance - Example
Pure Substance - Example
Sugar is an example of a pure substance.
Element vs. Compound
Element vs. Compound
Elements are one kind of atom; compounds are two or more different kinds of atoms.
Compound Example
Compound Example
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Classifying Matter by Composition
Classifying Matter by 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.
