Multiple choice general knowledge science & technology Which of the following is a non metal that remains liquid at room temperature? Phosphorous Bromine Chlorine Helium Reveal answer Fill a bubble to check yourself B Correct answer Explanation Bromine is the only non-metal element that exists as a liquid at standard room temperature (around 25°C). Phosphorus is a solid, chlorine and helium are gases. Mercury is liquid but is a metal, not a non-metal.