Problems

Author: John Hutchinson

Problem 1	Compare and contrast the chemical and physical properties of KCl and CCl4, and compare and contrast how the chemical bonding model can be used to account for these properties.
Problem 2	Why is the dipole moment of NaCl extremely large?
Problem 3	Explain why CO has a dipole moment but CO2 does not.
Problem 4	Explain why an atom with a high ionization energy is expected to have a high electronegativity. Explain why an atom with a high electron affinity is expected to have a high electronegativity.
Problem 5	Would you predict that a Kr atom has high electronegativity or low electronegativity? Predict the relative electronegativity of Kr and F.
Problem 6	Explain why S has a greater electronegativity than P but a smaller electronegativity than O.
Problem 7	N atoms have a high electronegativity. However, N atoms have no electron affinity, meaning that N atoms do not attract electrons. Explain how and why these facts are not inconsistent.
Problem 8	Explain why compounds formed from elements with large differences in electronegativities are ionic.
Problem 9	Explain why ionic compounds have much higher melting points than covalent compounds.