Chemistry Review

Front

What is a Chemical Change?

Back

A process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, or gas production.

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Front

What is a Physical Change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

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Front

What is the Law of Conservation of Mass?

Back

A principle stating that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

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Front

What is an Element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means, consisting of only one type of atom.

Front

What is a Compound?

Back

A substance formed when two or more elements chemically bond together in fixed proportions.

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Front

What is a Mixture?

Back

A combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What is a Metalloid?

Back

Elements that have properties of both metals and nonmetals, often found along the zig-zag line on the periodic table.

Front

What is the significance of Group 14 in the periodic table?

Back

Group 14 contains carbon and silicon, which are essential for life and technology; silicon is a key metalloid.

Front

How is the periodic table organized?

Back

The periodic table is organized by increasing atomic number from left to right.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

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