Jomo Kenyatta University Electronic Configuration Ionization Chemistry Problem

Chapter 8- home assignments-periodic properties
7. The electron configuration of a copper(I) ion is
A. [Ar]4s23d8.
B. [Ar]4s13d9.
C. [Ar]3d10.
D. [Ar]4s23d64p2.
E. [Kr].
8. The cobalt(III) ion, Co3+, has how many 3d electrons?
A. 0
B. 7
C. 6
D. 5
E. 4
9. Which of the atoms listed below has the largest radius?
A. Cl
B. I
C. P
D. Sb
E. Se
10. For which of the following reactions is the enthalpy change equal to the second ionization
energy of nitrogen?
A. N2+(g) → N3+(g) + e–
B. N2+(g) + e– →N+(g)
C. N(g) →N2+(g) + 2e–
D. N–(g) + e– → N2–(g)
E. N+(g) →N2+(g) + e–
11. Which of the elements listed below has the highest first ionization energy?
A. C
B. Ge
C. P
D. O
E. Se
16. Which of the following elements has the greatest metallic character?
A. Br
B. Se
C. Ni
D. As
E. Si
17. Which of the following is a basic oxide?
A. CO2
B. CaO
C. SO2
D. H2O
E. NO2
19. Which, if any, is the ground-state electron configuration for S2–?
A. [Ne] or 1s22s22p63s23p6
B. [Ar] or 1s22s22p63s23p6
C. 1s22s22p63s23p5
D. [Ar] or 1s22s22p63s23p4
E. None of the above
20. Which, if any, is the ground-state electron configuration for Mg2+?
A. [Ne] or 1s22s22p6
B. [Ar] or 1s22s22p6
C. 1s22s22p63s2
D. [Ne]3s23p2 or 1s22s22p63s23p2
E. None of the above
21. The following successive ionization energies correspond to an element in the third row of the
periodic table: I1 = 786.3 kJ/mol, I2 =1,580 kJ/mol, I3= 3,230 kJ/mol, I4 = 4,360 kJ/mol, I5 =
16,000, and I6 = 20,000 kJ/mol. Based on this pattern of ionization energies, identify the
A. Sulfur
B. Phosphorous
C. Silicon
D. Aluminum
E. None of the above

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