
Fall Semester Review
Flashcard
•
Science
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a compound?
Back
A substance formed when two or more elements are chemically bonded together.
2.
FLASHCARD QUESTION
Front
What does the '-131' in Iodine-131 indicate?
Back
It indicates the atomic mass of the isotope.
3.
FLASHCARD QUESTION
Front
Is flammability a chemical or physical property?
Back
Flammability is a chemical property.
4.
FLASHCARD QUESTION
Front
What are valence electrons?
Back
Electrons in the outermost energy level of an atom.
5.
FLASHCARD QUESTION
Front
What does the octet rule state?
Back
Most elements want to have 8 valence electrons.
6.
FLASHCARD QUESTION
Front
What is an element?
Back
A pure substance that cannot be broken down into simpler substances by chemical means.
7.
FLASHCARD QUESTION
Front
What is a mixture?
Back
A combination of two or more substances that are not chemically bonded.
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