The most reactive metal in the list has a density of  $\mathrm{g}/{\mathrm{cm}}^3$? Enter only the value.

The least reactive one has a density of _____.

Does there appear to be a link between density and reactivity? If yes, what?

Low-density metals are used for vehicles; as they save money on fuel and road repairs. Explain why.

Which of the low-density metals below is the most suitable for vehicles? Why? Give reasons.

Which element is stored in oil?

Which elements will react with cold water?

Choose one metal that will react with steam but not cold water. Draw a diagram of suitable apparatus for this reaction. (You must show how the steam is generated.)

Name the gas given off when elements react with cold water and steam.