What is the Law of Conservation of Mass?
Unit 3 IPC Chemical Reactions

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Science
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9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
It states that matter cannot be created or destroyed.
2.
FLASHCARD QUESTION
Front
In a chemical reaction, the number of atoms you begin with must be...
Back
the same as the number of atoms you end with.
3.
FLASHCARD QUESTION
Front
What is a sign that a chemical reaction has occurred?
Back
Formation of a gas.
4.
FLASHCARD QUESTION
Front
Elements in the same column of the periodic table have the same number of...
Back
Valence Electrons.
5.
FLASHCARD QUESTION
Front
How many valence electrons does Phosphorus (P) have?
Back
5.
6.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A process where substances (reactants) transform into different substances (products).
7.
FLASHCARD QUESTION
Front
What are reactants in a chemical reaction?
Back
The starting materials that undergo change.
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