Chemical Reaction Unit Review
Flashcard
•
Science
•
7th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a neutron?
Back
A neutron is a subatomic particle found in the nucleus of an atom, with no electric charge.
2.
FLASHCARD QUESTION
Front
What are elements?
Back
Elements are pure substances that cannot be broken down into simpler substances by chemical means. They are listed on the Periodic Table.
3.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a process where substances combine or break apart to form new substances, such as burning paper.
4.
FLASHCARD QUESTION
Front
Do all phase changes require energy?
Back
True. All phase changes (like melting or boiling) require energy to be added or taken away.
5.
FLASHCARD QUESTION
Front
What is the chemical symbol for copper?
Back
The chemical symbol for copper is Cu.
6.
FLASHCARD QUESTION
Front
What is a physical change?
Back
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.
7.
FLASHCARD QUESTION
Front
What is the difference between a compound and an element?
Back
A compound is a substance formed when two or more elements chemically bond together, while an element is a pure substance that cannot be broken down.
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