CHEM 121 Lecture Notes - Lecture 15: Atomic Radius, Electron Configuration, Transition Metal

11. Select the correct electron configuration for Cu. A) [Ar)4s 3d1 B) [Ar]4s 3d C) [Ar]4s 4p 3d D) [Ar]4s 4d E) [Ar]3d 12. Which of the following pairs is isoelectronic? A) Li' and K B) Na and Ne C) I and CI D) S and Ne E) Al and B 13. Choose the element with the highest ionization energy A) Na B) Mg C) Al D) O E) F 14. Which of the following has the smallest radius? A) F B) Mg C) o D) Ne E) Na 15. Which of the following is a correct order of lattice energy? B) LiF> LiCI> LiBr C) Na2O> MgO> Alb03 D) NaCl

1) Determine if the following sets of ions are either isoelectronic (Circle the correct answer. (5) b. A12, Na*, N3- c. Vs+, Sc3, P3 d. Mn2., Fe3,Co(isoelectronic/ not isoelectronic) (isoelectronic/ not isoelectronic) (isoelectronic/ not isoelectronic) (isoelectronic/ not isoelectronic) (isoelectronic/ not isoelectronic) 2) Circle the species in each of the following sets of atoms/ions that has the smaller radius. (5) a. K, Na, Rb b. As3, As, As2- d. Cl, Mg,P 3) Circle the species in each of the following pairs of atoms that has the higher first ionization energy. (5) a. Mg , Ba b. Al, CI c. Rb, Li d. CI, I e. Ne , K Circle the species in each of the following pairs of atoms that have the more negative electron affinity. (5) 4) a. Ar, P b. 0, Li c. Mg , S d. Rb,F e. Ca , He 5) Calculate the shielding constant using Slater's rule for: (show your work) a. The valence 'p' electron in F. (2) b. The valence 'd' electron in Ni. (2)

2) Circle the species in each of the following sets of atoms/ions that has the smaller radius. (5) a. K, Na, Rb b. As3, As, As2 e. Ca2.CI,K Circle the species in each of the following pairs of atoms that has the higher first ionization energy. (5) 3) a. Mg, Ba b. Al CI c. Rb, Li e. Ne , K Circle the species in each of the following pairs of atoms that have the more negative electron affinity. (5) 4) a. Ar, P b. O, Li c. Mg , S d. Rb,F e. Ca , He 5) Calculate the shielding constant using Slater's rule for: (show your work) a. The valence 'p' electron in F.(2) b. The valence 'd' electron in Ni. (2)