Pls tell reason for this exception..
Solution:
Down the group size of the atom increases due to which Vander Waals interaction increases and melting point increases. But down the group, the inert pair effect is maximum for Bi ([Xe] 4f155d106s26p3) hence the electrons in the s-orbital do not participate in bonding.
Thus decreased interaction with other atoms leads to a lower melting point or boiling point.
Down the group boiling point increases due to increasing molar mass. Bi has a lower boiling point attributed to the inert pair effect.
Down the group size of the atom increases due to which Vander Waals interaction increases and melting point increases. But down the group, the inert pair effect is maximum for Bi ([Xe] 4f155d106s26p3) hence the electrons in the s-orbital do not participate in bonding.
Thus decreased interaction with other atoms leads to a lower melting point or boiling point.
Down the group boiling point increases due to increasing molar mass. Bi has a lower boiling point attributed to the inert pair effect.