
Physical Science 8 | Midterm Practice 2
Flashcard
•
Chemistry
•
8th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law of conservation of mass states that in a closed system, the mass of the reactants must equal the mass of the products in a chemical reaction.
2.
FLASHCARD QUESTION
Front
What type of bond is formed between carbon and oxygen?
Back
A covalent bond is formed between carbon and oxygen, where they share electrons.
3.
FLASHCARD QUESTION
Front
What is a molecule?
Back
A molecule is two or more atoms held together by chemical bonds.
4.
FLASHCARD QUESTION
Front
What characterizes a heterogeneous mixture?
Back
A heterogeneous mixture has a non-uniform composition and its components are not chemically bonded.
5.
FLASHCARD QUESTION
Front
Which of the following is a covalent compound: NaCl, KBr, CO2, or AlCl3?
Back
CO2 (carbon dioxide) is a covalent compound.
6.
FLASHCARD QUESTION
Front
What is an ionic bond?
Back
An ionic bond is a type of chemical bond that occurs when electrons are transferred from one atom to another, resulting in the formation of charged ions.
7.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
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