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### 5 Cards in this Set

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 If Na has a first ioniozation energy of 496 kJ/mol, what is the frequency of light absorbed per photon in the photoionization of a gas phase Na sample? Given: I = h*v where I = ionization energy h = Planck's constant (6.62 x 10^-34) v = frequency Note: 496 kJ/mol (per mol of photons, not PER photon) So for one photon, I = 496/6E23 = 8.24E-22kJ Since I = hv, v= I/h=1.24E15 Hz Which of the following elements has the smallest atomic radius? Why? K, Ca, Cs, Ba Radius increases as you go down a group and decreases as you go across a period, thus, the element at the uppermost right is smallest. This would be CALCIUM For transition elements, in what order will s and d orbitals fill? S will fill before D does, despite D being of lower energy. What are the ground state configurations of Fe++ and Fe+++? For neutral Fe: [Ar]3d64s2 REMEMBER: Fe is a transition metal, so the electrons in the s orbital are technically of higher energy and therefore are removed first. So: Fe++: [Ar]3d6 Fe+++: [Ar]3d5 Given: D = -I(A) + Ea(B)-(ZaZbe^2)/(4pi*epsilon naught)*R Where D = Dissociation energy of a bond I(A) = Ionization energy of atom A Ea(B) = electron affinity of atom B R = Distance between ions and rest = Coulombia potentital energy At what point is it energetically favorable for Li & Cl to form Li+Cl-? Ionic bond forms if D> or = 0 because if D is (-) that means you're not putting in energy to break the bond. So it's breaking on its own. In order for the bond to be stable, D must be (+).