Chemistry Mini Proficiency #2 Review Short

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties.

Front

What is an example of a chemical change?

Back

Burning paper is an example of a chemical change, as it produces ash and smoke, which are new substances.

Front

How many elements are in the chemical formula Fe2O3?

Back

There are 2 different elements: Iron (Fe) and Oxygen (O).

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element present in the compound.

Front

What is the total number of atoms in the chemical formula H2SO4?

Back

There are 7 atoms in total: 2 Hydrogen (H), 1 Sulfur (S), and 4 Oxygen (O).

Front

What is rusting?

Back

Rusting is a chemical change where iron reacts with oxygen and moisture to form iron oxide, a new substance.

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What happens to the properties of a substance during a chemical change?

Back

The properties of the original substance change, and new properties emerge in the new substances formed.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.