Chemical Reactions & Equations

Front

What does the arrow symbol (→) in a chemical equation represent?

Back

The yield sign, indicating the direction of the reaction.

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

What are the substances called that are present before a chemical reaction?

Back

Reactants.

Front

What are the substances called that are produced after a chemical reaction?

Back

Products.

Front

What type of change occurs when ice melts?

Back

Physical change.

Front

What do the blue numbers in a chemical formula represent?

Back

Subscripts, indicating the number of atoms of each element.

Front

What do coefficients in a chemical equation indicate?

Back

The number of molecules or moles of a substance.

Front

What is a chemical reaction?

Back

A process where reactants transform into products.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance without changing its identity, while a chemical change results in the formation of new substances.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and smoke.