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Questions and Answers
What defines an element?
What defines an element?
- A pure substance with variable composition
- A substance made of two or more elements chemically combined
- A substance made of atoms that all contain the same number of protons (correct)
- A mixture that can be separated by physical means
Which of the following is a characteristic of a compound?
Which of the following is a characteristic of a compound?
- It can be separated by filtration
- It consists of two or more elements chemically combined (correct)
- It is made of only one type of atom
- It has a variable composition
Which of the following best describes a mixture?
Which of the following best describes a mixture?
- A substance that contains only one type of particle
- A compound that can be split into its elements chemically
- A pure substance with a fixed composition
- A combination of substances that can be separated by physical methods (correct)
Which statement about compounds is false?
Which statement about compounds is false?
What is an example of a mixture?
What is an example of a mixture?
Flashcards
What defines an element?
What defines an element?
A pure substance made of atoms with the same number of protons.
Characteristic of a compound?
Characteristic of a compound?
Two or more elements chemically combined.
What best describes a mixture?
What best describes a mixture?
A combination of substances separable by physical methods.
Which is false about compounds?
Which is false about compounds?
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Example of a mixture?
Example of a mixture?
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Study Notes
Elements, Compounds & Mixtures
- A substance can be classified as an element, compound, or mixture.
- Elements are made up of atoms that have the same number of protons.
- Elements cannot be broken down into simpler substances.
- There are 118 elements found on the periodic table.
- Compounds are pure substances made up of two or more elements chemically combined.
- There is an unlimited number of compounds.
- Compounds cannot be separated into their elements by physical means.
- Examples of compounds include copper(II) sulfate (CuSO4), calcium carbonate (CaCO3), and carbon dioxide (CO2).
- Mixtures are a combination of two or more substances (elements and/or compounds) that are not chemically combined.
- Mixtures can be separated by physical methods such as filtration or evaporation.
- Examples of mixtures include sand and water, oil and water, and sulfur powder and iron filings.
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Description
Test your knowledge on elements, compounds, and mixtures. This quiz covers the definitions, characteristics, and examples of each category. Determine how these substances differ and how they can be separated or combined.
