Elements, Compounds, and Mixtures
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is an element?
Back
An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and gold (Au).
2.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and carbon dioxide (CO2).
3.
FLASHCARD QUESTION
Front
What is a mixture?
Back
A mixture is a combination of two or more substances that are not chemically bonded. The individual substances retain their properties. Examples include air and salad.
4.
FLASHCARD QUESTION
Front
How can you classify a substance as a compound?
Back
A substance is classified as a compound if it consists of two or more different elements that are chemically combined in a fixed ratio.
5.
FLASHCARD QUESTION
Front
What is the difference between a mixture of elements and a mixture of compounds?
Back
A mixture of elements contains only individual elements (e.g., iron and sulfur), while a mixture of compounds contains different compounds (e.g., salt and sugar).
6.
FLASHCARD QUESTION
Front
What is the chemical formula for water?
Back
The chemical formula for water is H2O, indicating it is composed of two hydrogen atoms and one oxygen atom.
7.
FLASHCARD QUESTION
Front
What is the significance of chemical symbols?
Back
Chemical symbols are shorthand representations of elements, used to simplify chemical equations and formulas. For example, 'Na' represents sodium.
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