Elements, Compounds, and Mixtures
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a mixture?
Back
A mixture is a combination of two or more substances that are not chemically bonded together. Examples include air, salad, and saltwater.
2.
FLASHCARD QUESTION
Front
What is an element?
Back
An element is a pure substance that consists of only one type of atom. Examples include hydrogen (H), oxygen (O), and gold (Au).
3.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more different elements are chemically bonded together. Examples include water (H2O) and ammonia (NH3).
4.
FLASHCARD QUESTION
Front
What is the chemical formula for water?
Back
The chemical formula for water is H2O, which indicates it is made of two hydrogen atoms and one oxygen atom.
5.
FLASHCARD QUESTION
Front
What distinguishes a compound from a mixture?
Back
A compound is made of two or more elements that are chemically bonded, while a mixture consists of two or more substances that are physically combined.
6.
FLASHCARD QUESTION
Front
What is the chemical formula for ammonia?
Back
The chemical formula for ammonia is NH3, which consists of one nitrogen atom and three hydrogen atoms.
7.
FLASHCARD QUESTION
Front
What is an example of a pure substance?
Back
An example of a pure substance is distilled water, which contains only H2O molecules.
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