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

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.

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