The Halogen Which is Liquid at Room Temperature Is

The Halogen which is liquid at room temperature is bromine. The electronegative atoms of each period of the periodic table are called Halogens. When the group size of halogen rises the number of electrons and shells also increases. Now with increasing the number of shells their atomic mass is also increased. 

• Due to the high atomic mass of the bottom elements of this group, the physical state of the bottom elements is solid at room temperature. And due to low molecular mass upper elements are in a gaseous form at room temperature.
• Now the upper element of this group is Fluorine, and chlorine whereas the bottom elements are astatine and iodine bromine in the middle the group also the molecular mass of the form is not big to be solid as well as low to be gas. Due to this reason, the physical state of bromine is liquid at room temperature.