Elements, Compounds, and Mixtures
Flashcard
•
Science, Chemistry
•
6th - 8th Grade
•
Practice Problem
•
Easy
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15 questions
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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 oxygen (O), hydrogen (H), and gold (Au).
2.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements chemically bond 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. Examples include air, salad, and sand and salt.
4.
FLASHCARD QUESTION
Front
How can you identify an element?
Back
An element can be identified by its unique atomic number, which represents the number of protons in its nucleus.
5.
FLASHCARD QUESTION
Front
How can you identify a compound?
Back
A compound can be identified by its chemical formula, which shows the elements and their ratios, such as H2O for water.
6.
FLASHCARD QUESTION
Front
How can you identify a mixture?
Back
A mixture can be identified by the fact that its components retain their individual properties and can be separated by physical means.
7.
FLASHCARD QUESTION
Front
What is the difference between an element and a compound?
Back
An element is a single type of atom, while a compound consists of two or more different types of atoms chemically bonded together.
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