Periodic Table Unit Test Review
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does the law of conservation of matter state?
Back
Matter cannot be created or destroyed in a chemical reaction; it can only change forms.
2.
FLASHCARD QUESTION
Front
Where are electrons located in an atom?
Back
Electrons are located orbiting the nucleus of the atom.
3.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a type of matter that is composed of two or more elements that are chemically combined.
4.
FLASHCARD QUESTION
Front
What is the charge of a proton?
Back
A proton has a positive charge.
5.
FLASHCARD QUESTION
Front
What is the difference between an element and a compound?
Back
An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.
6.
FLASHCARD QUESTION
Front
What are the three main subatomic particles?
Back
The three main subatomic particles are protons (positive charge), neutrons (no charge), and electrons (negative charge).
7.
FLASHCARD QUESTION
Front
What is a heterogeneous mixture?
Back
A heterogeneous mixture is a combination of substances that are not uniformly distributed, meaning you can see the different components.
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