UPSC 2013 CDS 2 GK Paper

Mercury and Bromine are the elements which are liquids at room temperature and standard pressure. Mercury (Hg) has a special electronic configuration that means the bonds between themercury atoms are much weaker than the bonds of other metals, soit's liquid at room temperature. Bromine (Br) is a liquid because theintermolecular forces are strong enough so that it does not vapourise. Bromine forms diatomic molecules and van der Waalsinteractions are sufficiently strong