Chemical Reactions & Chemical Formulas

Front

What is a chemical reaction?

Back

A process where reactants transform into products, involving the breaking and forming of chemical bonds.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is a reactant?

Back

A substance that undergoes a change in a chemical reaction.

Front

What is a product?

Back

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

Front

What is a compound?

Back

A substance formed when two or more elements chemically bond together, such as CO2.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

How many elements are in the periodic table?

Back

There are currently 118 known elements.

Front

What is a molecule?

Back

A group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the chemical formula for methane?

Back

CH4, indicating one carbon atom and four hydrogen atoms.

Front

What is the chemical formula for carbon dioxide?

Back

CO2, indicating one carbon atom and two oxygen atoms.