Question
Consider the following boiling point data for these halogen molecules.
Substance Electrons Boiling Point (C)
F2 18 -188
Cl2 34 -34
Br2 70 59
I2 106 184
a) Explain the trend in the boiling points of the halogens by describing the intermolecular forces present. (3 marks)
b) Plot a graph of boiling point against the number of electrons. What force is directly related to number of electrons? (4 marks)
c) Use the graph to predict the boiling point og astatine, the remaining member of the halogen family (1 mark)
