Which among the following is the non-metal that exists in a liquid state at room temperature ?
Bromine
At room temperature (about 25 °C) most non-metals are either gases or solids. Bromine is the only non-metal that is a liquid under these conditions; its melting point is about −7 °C and its boiling point about 59 °C, so it is a dark reddish-brown, fuming liquid.
Mercury is the only metal that is liquid at room temperature, so mercury and bromine are the two elements usually quoted as liquids at ordinary temperature.
Carbon (graphite, diamond) and iodine (violet-black crystals) are solids at room temperature, while chlorine is a greenish-yellow gas. Since one of the listed elements fits, the none-of-the-above choice does not apply.
Bromine option is correct.
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