Properties of Substances and Elements

Front

What is the state of matter where molecules are randomly and widely spaced apart with no fixed pattern?

Back

Gas

Front

What do we call characteristics of a substance that can be measured or observed without changing the identity of the material?

Back

Physical property

Front

What type of change occurs when a piece of magnesium metal reacts with acid to form gas bubbles?

Back

Chemical change

Front

Which of the following is an example of a compound: Oxygen gas (O), Carbon dioxide (CO₂), Sea water, Italian salad dressing?

Back

Carbon dioxide (CO₂)

Front

What does the law of conservation of matter state during a chemical reaction?

Back

The total number of atoms of each element is the same before and after the reaction.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

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

Back

A physical property can be observed without changing the substance, while a chemical property can only be observed during a chemical reaction.

Front

What is an example of a physical property?

Back

Color, boiling point, melting point, and density.

Front

What is an example of a chemical property?

Back

Reactivity with acid, flammability, and oxidation states.