Questions and Answers
_______________ is the study of matter.
Chemistry
An ___________ is the smallest unit of an element with properties of that element.
Atom
A ________________ is made of two or more atoms connected or bonded together.
Molecule
A ________________________ is one or more different atoms bonded together.
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______________, ________________, and _________________ are the 3 states of matter.
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Atoms or molecules are attracted to one another and have a definite volume, but do not have a definite shape. It takes the shape of its container. This describes a ____________.
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Atoms or molecules are barely attracted to one another and have NO definite volume and NO definite shape. This describes a ____________.
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Atoms or molecules are VERY attracted to one another and have a definite shape and a definite volume. This describes a ____________.
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In molecular motion of a ____________, the atoms vibrate but do not move past one another.
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In molecular motion of a ______________, the atoms vibrate and will move freely past each other.
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Molecules speed up & get farther apart when they are ____________.
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_______________ is anything that has mass and takes up space.
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_____________ is a measure of the amount/quantity of a substance.
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____________________ is a measure of the amount of space a substance occupies.
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A _____________ has a definite shape and volume.
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A _____________ does not have a definite shape or volume.
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A _____________ takes the shape of the container it is in.
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A ___________ takes up a specific amount of space and has a definite shape.
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Volume is the amount of space that something takes up.
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A ____________ is a state of matter that has a definite shape and a definite volume. The atoms or molecules are very attracted to one another.
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Study Notes
Key Concepts in Chemistry
- Chemistry involves the study of matter, which encompasses everything with mass and occupies space.
- Atoms are defined as the smallest units of an element, acting as the foundational building blocks of all matter.
Molecular Structures
- A molecule consists of two or more atoms bonded together, forming the basic structure of compounds.
- A compound refers to molecules made of different types of atoms connected together, illustrating chemical diversity.
States of Matter
- There are three primary states of matter: solid, liquid, and gas, each characterized by unique properties.
Properties of States
- Solid: Atoms or molecules are tightly packed, resulting in a definite shape and volume. They vibrate but do not move past one another.
- Liquid: Atoms or molecules have a moderate attraction; they have a definite volume but take the shape of their container.
- Gas: Atoms or molecules experience minimal attraction, leading to no definite shape or volume, as they expand to fill any container.
Molecular Motion
- In a solid, atoms vibrate in place, maintaining a fixed structure.
- In a liquid, molecules can slide past one another while maintaining a fixed volume.
- In a gas, molecules move freely and rapidly, with significant space between them.
Effects of Temperature
- Heating a solid or liquid causes its molecules to speed up and move further apart, leading to a change in state.
Measurements in Chemistry
- Mass quantifies the amount of a substance present.
- Volume measures the space occupied by a substance, crucial for understanding the physical characteristics of matter.
Important Definitions
- Matter: Anything that has mass and occupies space.
- Mass: A measure of the quantity of a substance.
- Volume: The amount of space a substance occupies.
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Description
Test your understanding of the fundamental concepts in chemistry with these flashcards from Chapter 1 on matter. Each card features key terms such as chemistry, atom, and molecule, providing definitions to enhance your learning experience. Ideal for middle school students looking to reinforce their knowledge.
