Element, Compound, Mixture
Flashcard
•
Chemistry
•
7th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is an element?
Back
An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and gold (Au).
2.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and carbon dioxide (CO2).
3.
FLASHCARD QUESTION
Front
What is a mixture?
Back
A mixture is a combination of two or more substances that are not chemically bonded. The individual substances retain their properties. Examples include air and salad.
4.
FLASHCARD QUESTION
Front
What is a homogeneous mixture?
Back
A homogeneous mixture is a mixture that has a uniform composition throughout. Examples include saltwater and sweet tea.
5.
FLASHCARD QUESTION
Front
What is a heterogeneous mixture?
Back
A heterogeneous mixture is a mixture where the components are not uniform and can be easily distinguished. Examples include salad and sand.
6.
FLASHCARD QUESTION
Front
What is a molecule?
Back
A molecule is the smallest unit of a chemical compound that retains its chemical properties. It is made up of two or more atoms bonded together. Example: H2 (hydrogen gas).
7.
FLASHCARD QUESTION
Front
What is the difference between a compound and a mixture?
Back
A compound is a substance formed from two or more elements that are chemically bonded, while a mixture is a combination of substances that are not chemically bonded.
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