Pure Substances and Mixtures
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a pure substance?
Back
A pure substance is matter that has a uniform and definite composition. It can be an element or a compound.
2.
FLASHCARD QUESTION
Front
What is a mixture?
Back
A mixture is a combination of two or more substances where each substance retains its own properties.
3.
FLASHCARD QUESTION
Front
Define an element.
Back
An element is matter consisting of one kind of atom and cannot be broken down into simpler substances.
4.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements are chemically bonded together.
5.
FLASHCARD QUESTION
Front
What is the difference between a homogeneous mixture and a heterogeneous mixture?
Back
A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has visibly different substances or phases.
6.
FLASHCARD QUESTION
Front
What is the chemical formula for nitrogen gas?
Back
7.
FLASHCARD QUESTION
Front
How many protons does an aluminum atom have?
Back
An aluminum atom has 13 protons.
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