What is the definition of an element?
Elements, Compounds, and Mixtures/Balancing Equations

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Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.
2.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more different elements are chemically bonded together in a fixed ratio.
3.
FLASHCARD QUESTION
Front
What is a mixture?
Back
A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.
4.
FLASHCARD QUESTION
Front
What is the difference between a homogeneous mixture and a heterogeneous mixture?
Back
A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non-uniform composition with distinct phases.
5.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
6.
FLASHCARD QUESTION
Front
How do you determine the coefficient in a chemical equation?
Back
The coefficient in a chemical equation indicates the number of molecules or moles of a substance involved in the reaction.
7.
FLASHCARD QUESTION
Front
What is an example of a homogeneous mixture?
Back
An example of a homogeneous mixture is saltwater, where the salt is completely dissolved in water.
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