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What is matter?
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Key Terms
Term
Definition
What is matter?
Matter is anything that takes up space and has mass.
What determines the observable characteristics of matter?
The properties of microscopic particles determine the observable characteristics of matter.
Define a pure substance.
A pure substance is any substance that cannot be separated into simpler components by physical methods.
What is an element?
An element is a pure substance consisting of one type of atom.
What is a compound?
A compound is a pure substance composed of two or more different elements in a fixed ratio.
Define a mixture.
A mixture is the combination of two or more pure substances that are not bonded together.
Related Flashcard Decks
| Term | Definition |
|---|---|
What is matter? | Matter is anything that takes up space and has mass. |
What determines the observable characteristics of matter? | The properties of microscopic particles determine the observable characteristics of matter. |
Define a pure substance. | A pure substance is any substance that cannot be separated into simpler components by physical methods. |
What is an element? | An element is a pure substance consisting of one type of atom. |
What is a compound? | A compound is a pure substance composed of two or more different elements in a fixed ratio. |
Define a mixture. | A mixture is the combination of two or more pure substances that are not bonded together. |
What is a homogeneous mixture? | A homogeneous mixture is a mixture of uniform composition where all components are in the same phase. |
What is a heterogeneous mixture? | A heterogeneous mixture is a mixture of non-uniform composition where components can be easily identified. |
What is a metalloid? | Metalloids are elements with properties between metals and non-metals, often used as semiconductors. |
What is the main property of metals? | Metals are good conductors of heat and electricity, and are ductile and malleable. |
What is a semiconductor? | A semiconductor is a material that can conduct electricity under certain conditions but not others. |
What is an electrical insulator? | An electrical insulator is a material that prevents the flow of charge. |
What is a thermal conductor? | A thermal conductor is a material that allows heat to pass through easily. |
What is a thermal insulator? | A thermal insulator is a material that does not allow heat to pass through it. |
What are the magnetic elements? | The magnetic elements are iron (Fe), nickel (Ni), and cobalt (Co). |
What is a ferromagnetic material? | A ferromagnetic material is easily magnetized when brought into contact with a permanent magnet. |
What is the difference between metals and non-metals in terms of conductivity? | Metals are good conductors of heat and electricity, while non-metals are poor conductors. |
What is the significance of melting and boiling points in pure substances? | Pure substances have fixed melting and boiling points, which can be used to test their purity. |
How can substances in a mixture be separated? | Substances in a mixture can be separated by mechanical means such as filtering, evaporating, and distillation. |
What is the role of silicon in electronics? | Silicon, a metalloid, is widely used in electronics due to its semiconductor properties. |