(a) Using principles of atomic structure, explain why the first ionization energy of Rn is less than that of Xe.

(b) The dipole moment of the XeO2F2 molecule is nonzero. Identify its molecular geometry and explain how its geometry and the polarity of its bonds result in a nonzero dipole moment.

(use the following to answer c1 - 2) The melting point of XeO2F2 is greater than the melting point of XeO3F2.

(c1) Identify the type(s) of intermolecular force(s) that the two substances have in common.

(c2) Explain the difference in melting points based on the types and relative strengths of intermolecular forces