7.1 OpenSciEd

Front

What gases are released when electricity is run through water?

Back

Oxygen and hydrogen.

Front

What are the three states of matter?

Back

Gas, liquid, solid.

Front

What happens to matter in a chemical reaction?

Back

It is neither created nor destroyed; it changes from one form to another.

Front

What type of system allows matter and energy to flow in and out?

Back

Open system.

Front

How many atoms of sodium are in the molecule Na3Cl?

Back

3.

Front

What is the definition of matter?

Back

Anything that has mass and takes up space.

Front

What is the definition of a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is the definition of an atom?

Back

The basic unit of a chemical element.

Front

What is the definition of a molecule?

Back

Two or more atoms bonded together.