Chemical Reactions

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. An example is getting a haircut.

Front

What is the chemical formula for water?

Back

H₂O

Front

Is H₂O an element or a compound?

Back

H₂O is a compound.

Front

What is a compound made up of?

Back

A compound is made up of one or more different atoms.

Front

What is a molecule?

Back

A molecule is a group of atoms bonded together.

Front

What are the one or two letters used to represent elements called?

Back

They are called symbols.

Front

What is the difference between an element and a compound?

Back

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

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting materials in a chemical reaction that undergo change.

Front

What are products in a chemical reaction?

Back

Products are the substances that are formed as a result of a chemical reaction.