Questions and Answers
What are molecules?
A molecule is two or more atoms joined together; the smallest unit of many substances.
How are compounds different from elements?
They have two different atoms, and two properties.
What are some uses for new materials scientists have developed?
Safety helmet, sunglasses, weatherproof jacket, fleecewear pants, tennis racket, gel-cushion in shoes, bone cement, and inline skates.
Compare and contrast molecules and compounds.
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What is a compound?
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Is a single oxygen atom a molecule? Why or why not?
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Are all molecules of any one compound, such as water, alike?
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How does a compound differ from a molecule?
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Study Notes
Definition of Molecules
- A molecule consists of two or more atoms joined together, forming the smallest unit of various substances.
Differences Between Compounds and Elements
- Compounds are composed of two different types of atoms and possess distinct properties compared to individual elements.
Applications of New Materials
- New materials developed by scientists include:
- Safety helmets
- Sunglasses
- Weatherproof jackets
- Fleecewear pants
- Tennis rackets
- Gel cushions in shoes
- Bone cement
- Inline skates
Comparison of Molecules and Compounds
- Similarities: Both start from atoms and form when atoms join together.
- Differences: Compounds require two different atoms while molecules can consist of two identical atoms.
Definition of Compounds
- A compound is a substance made from atoms of more than one element that are chemically bonded in a molecule.
Molecule Composition of Oxygen
- A single oxygen atom does not qualify as a molecule because a molecule requires two or more atoms.
Uniformity of Compounds
- All molecules of a given compound, such as water, are identical; each molecule represents the smallest part of that compound.
Distinction Between Compounds and Molecules
- Compounds must be formed from two or more different atoms, whereas molecules can consist of identical atoms.
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Description
Explore the fundamentals of molecules and compounds in this quiz. Learn about the definitions, differences, and applications of new materials. Test your knowledge on how atoms combine to form different substances.
