Question

What determines if an element is a solid or liquid at room temperature?

Answer 1

We have to determine the boiling point and freeezing point for it at room tempreature:
IN SOLID: boiling and freezing point is above room tempreature.
IN LIQUID: boiling point is above room tempreature and freezing point is below room tempreature.
IN GAS: boiling and freezing point is below room tempreature.