Physical Science Mid-term Review

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What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, such as grilling a hamburger.

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What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals, such as silicon and germanium.

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What is sublimation?

Back

Sublimation is the process where a solid changes directly into a gas without passing through the liquid state, like dry ice turning into carbon dioxide gas.

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What is melting?

Back

Melting is the process where a solid turns into a liquid, such as ice cream melting in warm temperatures.

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What are pure substances?

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Pure substances are materials that have a uniform and definite composition, including elements and compounds.

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What is the difference between elements and compounds?

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Elements are pure substances that consist of only one type of atom, while compounds are substances formed from two or more different types of atoms chemically bonded together.

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What is vaporization?

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Vaporization is the process of turning from a liquid into a gas, which includes both evaporation and boiling.

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What is condensation?

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Condensation is the process where a gas turns into a liquid, often seen when water vapor cools and forms droplets.

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What are transition metals?

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Transition metals are elements found in groups 3-12 of the periodic table, known for their ability to form various oxidation states and colored compounds.

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What are halogens?

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Halogens are a group of elements in group 17 of the periodic table, known for being highly reactive nonmetals, such as fluorine and chlorine.