Flashcardziz Chemistry Test Review

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties. Examples include air and salad.

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. Examples include ripping paper and melting ice.

Front

What is a chemical change?

Back

A chemical change occurs when a substance transforms into a different substance with different properties. Examples include burning wood and cooking.

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

How many carbon atoms are in two molecules of C6H12O6?

Back

There are 12 carbon atoms in two molecules of C6H12O6.

Front

What is the formula for calculating the total mass of products in a chemical reaction?

Back

Total mass of products = Total mass of reactants.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What period is sodium (Na) found in on the periodic table?

Back

Sodium (Na) is found in period 3 of the periodic table.

Front

What is an example of a physical property?

Back

An example of a physical property is color, boiling point, or density.