Elements, Compounds, and Mixtures
Flashcard
•
Chemistry
•
6th 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) and oxygen (O).
2.
FLASHCARD QUESTION
Front
Which of the following represents an element? H2O, H2, NaCl, CaCO3
Back
H2
3.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements are chemically bonded together. For example, water (H2O) is a compound made of hydrogen and oxygen.
4.
FLASHCARD QUESTION
Front
How many elements are represented in the compound Na2CO3?
Back
3
5.
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 and salad.
6.
FLASHCARD QUESTION
Front
What cannot be broken down into other substances?
Back
Element
7.
FLASHCARD QUESTION
Front
What are atoms?
Back
Atoms are the smallest units of matter that make up all substances. They consist of protons, neutrons, and electrons.
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