1.7 Consider an atom in a simple cubic crystal and located at the origin. Find the distance between this atom and its first, second, and third nearest neighbors in terms of the lattice constant a. Express the vectors from this atom to its first, second, and third nearest neighbors in Miller indices. How many first, second, and third nearest neighbors does this atom have

Which of the following elements would you expect to have the highest ionization energy value, and why? a. chlorine (cl), because it has a low effective nuclear charge and large radius b. fluorine (f), because it has a large radius and naturally forms a negative ion c. lithium (li), because it has a small radius and naturally forms a positive ion d. neon (ne), because it has a high effective nuclear charge and small radius