HChem 512 Unit 1Review: Matter and Its Changes

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What is a physical property?

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A characteristic of a substance that can be observed or measured without changing the substance's identity. Example: Malleability (easily shaped).

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What is an atom?

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The basic particle from which all elements are made. It is the smallest unit of an element that retains the properties of that element.

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What is a compound?

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A substance formed when two or more elements are chemically bonded together. Example: Water (H2O) is a compound made of hydrogen and oxygen.

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What are the states of matter?

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The distinct forms that different phases of matter take on. The main states are solid, liquid, gas, and plasma.

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What defines a solid?

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A state of matter that has a definite shape and volume, with particles that are tightly packed together.

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What defines a liquid?

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A state of matter that has a definite volume but takes the shape of its container, with particles that are close together but can move past one another.

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What defines a gas?

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A state of matter that has neither a definite shape nor a definite volume, with particles that are far apart and move freely.

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What is flammability?

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A chemical property that describes how easily a substance can catch fire and burn.

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What is corrosiveness?

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A chemical property that describes the ability of a substance to damage or destroy other materials upon contact.

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What is malleability?

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A physical property that describes the ability of a substance to be shaped or deformed without breaking.