Here's a breakdown:
* Density of Zinc: 7.14 g/cm³
* Density of Iron: 7.87 g/cm³
* Density of Aluminum: 2.70 g/cm³
* Density of Copper: 8.96 g/cm³
* Density of Lead: 11.34 g/cm³
As you can see, zinc's density is higher than aluminum but lower than iron, copper, and lead.