Which non-metal exists in the liquid state at room temperature?

The correct answer is Bromine.

Key Points

• Bromine is a chemical element with the symbol Br and atomic number 35.
• It is the third-lightest halogen and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas.
• Its properties are thus intermediate between those of chlorine and iodine.
• Bromine is used in many areas such as agricultural chemicals, dyestuffs, insecticides, pharmaceuticals, and chemical intermediates.
  • Some uses are being phased out for environmental reasons, but new uses continue to be found.
  • Bromine compounds can be used as flame retardants.

Additional Information

• Mercury(liquid metal) is a chemical element with the symbol Hg and atomic number 80. 
• Iodine is a chemical element with the symbol I and atomic number 53. 
  • Iodine is a trace element that is naturally present in some foods, is added to some types of salt, and is available as a dietary supplement.
• Chlorine is a chemical element with the symbol Cl and the atomic number 17.
  • Chlorine kills bacteria – it is a disinfectant.
  • It is used to treat drinking water and swimming pool water.