8th grade chemistry

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of reactants equals the total mass of products.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. An example is vinegar.

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

How can you identify an element?

Back

An element is identified by its number of protons, which is unique to each element.

Front

What happens to mass during a chemical reaction?

Back

The total mass of the products is equal to the total mass of the reactants, according to the Law of Conservation of Mass.

Front

What is a reactant?

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.

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 is an example of a gas released during a chemical reaction?

Back

An example of a gas released during a chemical reaction is carbon dioxide, which can be produced in reactions like baking soda and vinegar.

Front

What is the atomic mass of an element?

Back

The atomic mass of an element is the weighted average mass of the atoms in a naturally occurring sample of the element.