Chapter 6.3-6.5
Supplemental Instruction
Iowa State University / Leader: / Tina Akinyi
Course: / Chem 177
Instructor: / David Appy
Date: / 3/4/15
1. Compare the Balmer and Bohr models for hydrogen. What are some differences/similarities? Do they describe the same thing?
2. For which of the following transitions would a Hydrogen atom absorb a photon with the longest wavelength?
(A) n=1 to n=2 (B) n=3 to n=2 (C) n=5 to n=6 (D) n=7 to n=6
3. How much energy would be released if a Hydrogen electron transitioned from the n=4 to the n=3 energy level?
(A) 2.043 E-18 J (B) 3.981 E-18 J (C)1.958 E- 18 J (D) 1.050 E-19 J
4. What is the frequency of light emitted in question 3 above?
(A) 1.58 E 14 Hz (B) 6.31 E -15 Hz (C) 1.89 E-4 Hz (D) 9.96 E-53 Hz
5. Each of these atomic orbitals is possible except?
(A) 1s (B) 2p (C) 3f (D) 4d
6. Which set of quantum numbers is not possible?
(A) n=2, l=1, ml=+1, ms= - ½ (B) n=3, l=2, ml=+1, ms=+ ½
(C ) n=4, l=4, ml= -1, ms=+ ½ (D) n=5, l=3, ml=2, ms= - ½
7. The electron configuration of Cobalt (Z=27) is 1s22s22p63s23p63d74s2. How many unpaired electrons are in a gaseous Co 3+ ion in its ground state?
(A) 0 (B) 2 (C) 4 (D) 6
8. Which gas-phase atom in its ground state could have an electron with the quantum numbers: n=3, l=2, ml=0 and ms=- ½
(A) Na (B) Mg (C) P (D) Ti
9. Write the electron configurations of the following atoms. (Use the Noble gas notation)
(A) Ag (Z=47)
(B) Ba (Z=56)
(C) Eu (Z=63)
(D) Ir (Z=77)
How many valence electrons are in each of the atoms above?