Choose the name of a substance from the box to answer parts (a) to (e). Each name may be used once, more than once or not at all.
argonchlorinehematiteheliumnitric acid \begin{array}{|ccccc|} \hline \textbf{argon} & \textbf{chlorine} & \textbf{hematite} & \textbf{helium} & \textbf{nitric acid} \\ \hline \end{array} argonchlorinehematiteheliumnitric acidGive the name of:
a gaseous element in Group 0 used to provide an inert atmosphere in lightbulbs.
an important iron ore.
a halogen that exists as a pale green gas at room temperature.
a strong acid used to manufacture ammonium nitrate fertilisers.
a noble gas that makes up approximately 0.9% of the Earth's atmosphere.
