P.2 Chemical Reactions Unit Pre-Test

Front

What is defined as an ending substance that is produced during a chemical reaction?

Back

Product

Front

What indicates a chemical change?

Back

Temperature change (without external heat added/removed)

Front

What term describes letters and numbers showing the types and number of atoms that repeat to make up a substance?

Back

Chemical formula

Front

Which of the following is NOT a substance? Water (H2O), Diamond (C), Hydrogen peroxide (H2O2), Chicken nuggets (Ck3Ng2T)

Back

Chicken nuggets (Ck3Ng2T)

Front

What is a structure formed by repeating groups of atoms that link together in a large network?

Back

Extended structure

Front

What is a reactant?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a chemical reaction?

Back

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

Front

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

Back

A physical change does not alter the chemical composition, while a chemical change does.

Front

What is an atom?

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.