2024 - Fall Final Exam Modified 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 homogeneous mixture?
Back
A homogeneous mixture is a mixture in which the composition is uniform throughout. An example is coffee.
2.
FLASHCARD QUESTION
Front
What makes atoms stable?
Back
Atoms are most stable when their outer shell is complete, meaning they have a full set of electrons.
3.
FLASHCARD QUESTION
Front
What are Halogens?
Back
Halogens are a group of elements in Group 17 of the periodic table, known for their reactivity and include elements like fluorine and chlorine.
4.
FLASHCARD QUESTION
Front
What is a chemical property?
Back
A chemical property is a characteristic of a substance that can only be observed during a chemical reaction, such as flammability.
5.
FLASHCARD QUESTION
Front
What is the Lewis Dot Structure for ammonia (NH3)?
Back
The Lewis Dot Structure for ammonia shows nitrogen in the center with three hydrogen atoms bonded to it, and a lone pair of electrons on nitrogen.
6.
FLASHCARD QUESTION
Front
What is an example of a physical property?
Back
An example of a physical property is color, boiling point, or melting point.
7.
FLASHCARD QUESTION
Front
What distinguishes a chemical change from a physical change?
Back
A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of a substance.
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