Chemical Reactions

Front

______ is (are) made of more than one atom.

Back

A molecule

Front

What kind of scientist forms new chemicals by studying chemical reactions?

Back

Materials scientist

Front

Is TNT exploding a physical or a chemical change?

Back

Chemical

Front

If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?

Back

5 atoms

Front

Which of the following are properties of matter?

Back

All the above

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products).

Front

What is the law of conservation of mass?

Back

Matter cannot be created or destroyed in a chemical reaction.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

Substances that are formed as a result of a chemical reaction.

Front

What is an example of a physical change?

Back

Melting ice.