Unit Two Review

Front

Fill in the blank: A compound can only be broken down into its individual components through a ________.

Back

chemical reaction

Front

A compound is:

Back

a substance formed when two or more chemical elements are chemically bonded together.

Front

What type of reaction absorbs heat?

Back

endothermic reaction.

Front

If the temperature before the experiment was 20° C and after it was 15°C, what type of reaction likely occurred?

Back

An endothermic reaction occurred.

Front

In ionic bonding, ions come together because:

Back

positive and negative ions attract.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

Define endothermic reaction.

Back

A reaction that absorbs energy in the form of heat.

Front

Define exothermic reaction.

Back

A reaction that releases energy in the form of heat.

Front

What is ionic bonding?

Back

A type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.