Two basic properties of liquid phase are

A liquid is a nearly incompressible fluid that takes the shape of its container but retains a (nearly) constant volume of pressure. As such, it is one of the four fundamental states of matter (the others being solid, gas, and plasma), and is the only state with a definite volume but no fixed shape.

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).