Elements and Compounds 2024 Fall Final Exam Review

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means. Examples include oxygen (O), carbon (C), and hydrogen (H).

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What is a compound?

Back

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 is a mixture?

Back

A combination of two or more substances that are not chemically bonded. Example: Salad is a mixture of various vegetables.

Front

What is the chemical formula for sulfuric acid?

Back

H2SO4, which consists of 2 hydrogen, 1 sulfur, and 4 oxygen atoms.

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What is the symbol for oxygen?

Back

O.

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What is the symbol for calcium?

Back

Ca.

Front

What is the difference between an element and a compound?

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An element is a single type of atom, while a compound consists of two or more different types of atoms chemically bonded together.

Front

What is the chemical formula for water?

Back

H2O, which consists of 2 hydrogen atoms and 1 oxygen atom.

Front

What is a homogeneous mixture?

Back

A mixture that has a uniform composition throughout. Example: Saltwater.

Front

What is a heterogeneous mixture?

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A mixture that consists of visibly different substances or phases. Example: A salad.