Q Question 1 Lattice energy is . Question 2 The diagram below is the Born-Huber cycle for the formation of crystalline potassium fluoride. Which energy change corresponds to the electron affinity of fluorine? Question 3 The type of compound that is most likely to contain a covalent bond is . Question 4 Which of the following bonds would be considered non-polar covalent? Question 5 How many electrons are in the Lewis structure of a nitrite ion (NO2-)?