
Final Review 2nd Semester - Physical Science
Flashcard
•
Physics
•
9th - 10th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is Decomposition in chemistry?
Back
Decomposition is a type of chemical reaction where one compound breaks down into two or more simpler substances. Example: NO2 → N2 + O2.
2.
FLASHCARD QUESTION
Front
What is a Chemical Change?
Back
A chemical change is a process that results in the formation of one or more new substances with different chemical properties. Example: Rusting of iron.
3.
FLASHCARD QUESTION
Front
What is the Atomic Number?
Back
The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity. Example: The atomic number of Lithium (Li) is 3.
4.
FLASHCARD QUESTION
Front
What is a Mixture?
Back
A mixture is a combination of two or more substances that are not chemically bonded. Example: Salt water is a mixture of salt (NaCl) and water.
5.
FLASHCARD QUESTION
Front
What is a Compound?
Back
A compound is a substance formed when two or more elements are chemically bonded together. Example: Sodium chloride (NaCl) is a compound.
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. Example: Melting ice.
7.
FLASHCARD QUESTION
Front
What is the difference between an Element and a Compound?
Back
An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.
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