The element that is a liquid at room temperature and a gas at higher temperatures is bromine (Br).

Here's why:

* Room Temperature: Bromine has a melting point of -7.2 °C (19.0 °F) and a boiling point of 58.8 °C (137.8 °F). This means that at normal room temperatures (around 20-25 °C or 68-77 °F), bromine exists as a dark reddish-brown liquid.

* Gas Temperature: When heated above its boiling point, bromine transitions into a reddish-brown gas.

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