Final Review 2nd Semester - Physical Science

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What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals. They are often semiconductors, meaning they can conduct electricity better than nonmetals but not as well as metals.

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What is a synthesis reaction?

Back

A synthesis reaction, also known as a combination reaction, occurs when two or more substances combine to form a single product. For example, Si + S8 → Si2S4.

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What does atomic mass represent in the periodic table?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). It is usually found below the element's symbol on the periodic table.

Front

What is the chemical symbol for Argon?

Back

The chemical symbol for Argon is Ar.

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What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together. For example, sodium chloride (NaCl) is a compound made of sodium and chlorine.

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What are the three main types of elements?

Back

The three main types of elements are metals, nonmetals, and metalloids.

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What is the difference between an element and a compound?

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An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements that are chemically combined.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of chemical elements, organized by increasing atomic number, electron configuration, and recurring chemical properties.

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What is a chemical symbol?

Back

A chemical symbol is a one or two-letter notation used to represent an element. For example, H is the symbol for hydrogen.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. The components of a mixture can be separated by physical means.