Question

Explain the trends in the following properties, with reference to group-16?

Density.

Answer 1

Density.
The density of group 16 elements increases on moving down the group.
On moving down the group, the increase in atomic mass is more than the increase in atomic size.
It increases the magnitude of van-der-Waals forces of attraction acting between the molecules resulting in compact lattice formation of elements. As a result, density increases down the group.