Chemical reactions

Front

a substance that is formed as the result of a chemical reaction

Back

Product 

Front

Describes the number of atoms in a compound of each element.

Back

subscript

Front

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.

Back

Cold

Front

In a ___________ change, a substance changes into a different substance.

Back

Chemical

Front

What happens to a copper penny after a few years?

Back

It turns greenish due to a chemical change.

Front

How many Al atoms are in this compound? 4Al₂O₃

Back

8

Front

Which of these is NOT a sign that a chemical change has occurred? A loss of transparency, An unexpected color change, A temperature change, The formation of a precipitate

Back

A loss of transparency

Front

Provides evidence that a chemical reaction has occurred.

Back

formation of a gas

Front

In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?

Back

Reactants

Front

a chemical reaction that releases energy by light or heat

Back

Exothermic Reaction