Terms to Learn Chemical Reactions

Front

What is a chemical change?

Back

A change that occurs during a chemical reaction resulting in matter with different properties.

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What do chemical equations represent?

Back

Chemical reactions, including chemical symbols, chemical formulas, and arrows.

Front

What is a subscript in a chemical formula?

Back

The little number to the right and under an element symbol that tells how many atoms of that element are present.

Front

What is a reactant in a chemical reaction?

Back

Substances that go into a chemical reaction, found on the left side of the chemical equation.

Front

What is a physical change?

Back

A change in size, shape, or form of matter, but the matter stays the same.

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What is a product in a chemical reaction?

Back

Substances that result from a chemical reaction, found on the right side of the chemical equation.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, matter is neither created nor destroyed; it is conserved.

Front

What is a chemical reaction?

Back

A process where reactants are transformed into products through breaking and forming bonds.

Front

What are coefficients in a chemical equation?

Back

Numbers placed in front of chemical formulas to indicate the number of molecules involved in the reaction.

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What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings, usually in the form of heat.