Question Answered
Time Elapsed
Smart Score
Most of the ammonia produced every year is used by farmers to help crops grow. The chemical formula for ammonia is NH3.
Complete the statement.
Ammonia is __________ .
Helium is a gas that is less dense than air. So, helium is often used to fill balloons to make them float. The chemical formula for helium is He.
Complete the statement.
Helium is _________ .
Titanium is a strong, lightweight metal often used to make tennis rackets and golf clubs. The chemical formula for titanium is Ti.
Complete the statement.
Titanium is ________ .
Hydrogen peroxide can be used to kill bacteria on medical tools. The chemical formula for hydrogen peroxide is
Complete the statement.
Hydrogen peroxide is ________ .
Graphite is used to make pencil lead. The chemical formula for graphite is C.
Complete the statement.
Graphite is __________ .
Copper is a metal that is used in electrical wires and in coins. The chemical formula for copper is Cu.
Complete the statement.
Copper is __________ .
Hydrazine is used in some types of rocket fuels. The chemical formula for hydrazine is N2H4.
Complete the statement.
Hydrazine is _________ .
Bromomethane was once used by farmers to kill harmful organisms in soil. It is no longer used because it damages the atmosphere's ozone layer. The chemical formula for bromomethane is CH3Br.
Complete the statement.
Bromomethane is _________ .
Beryllium is a strong, lightweight metal used to make mirrors for space telescopes. The chemical formula for beryllium is Be.
Complete the statement.
Beryllium is _________ .
Palladium is a metal that reacts with the gases produced by car engines to make the gases less harmful. The chemical formula for palladium is Pd.
Complete the statement.
Palladium is __________ .