
Chemistry -- 8th Grade Science Review
Flashcard
•
Chemistry
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
How many atoms of Aluminum are in 2Al₂(CO₃)₃?
Back
4
2.
FLASHCARD QUESTION
Front
What part of the atom is responsible for all chemical reactions?
Back
Valence electron
3.
FLASHCARD QUESTION
Front
Is the following equation balanced? 4 FeS + 7 O₂ → 2 Fe₂O₄ + 4 SO₂
Back
No
4.
FLASHCARD QUESTION
Front
When stomach acid helps to break down food into smaller particles, this is an example of what kind of change?
Back
Chemical change
5.
FLASHCARD QUESTION
Front
Which of the following is not true when referring to the Law of Conservation of Mass? The coefficients in the reactants must be the same as the coefficients in the products.
Back
The coefficients in the reactants must be the same as the coefficients in the products.
6.
FLASHCARD QUESTION
Front
What is the definition of an atom?
Back
The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.
7.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change alters the form of a substance without changing its identity, while a chemical change results in the formation of new substances.
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