Chem 101 - Exam 2

Chem 101 - Exam 2



h = 6.63 x 10-34 J-s

1. What is the wavelength of a photon with an energy equal to 2.9 x l0-
19 joules? (h = 6.6 x 10-34 J-s, C = 3.0 x l08 m/s)


a) 6.4 x 10-8 cm
b) 1560Å
c) 2.27 x 10-8 m
d) 680 nm
e) 132 nm

2. Which of the following elements would NOT contain an electron having the
quantum numbers? n=4, l=2, ml=0, ms=+1/2

a) Sn
b) Ag
c) Ba
d) Ni
e) Rn

3. Which of the following electronic transitions would yield
the LONGEST wavelength of light?

a) n=3 --> n=1
b) n=3 --> n=2
c) n=2 --> n=1
d) n=5 --> n=4
e) n=4 --> n=1

4. What is the outer shell (valence) configuration of the atoms of Group VIA?

a) ns2np6
b) ns2np4
c) ns2np6nd6
d) ns2np3
e) ns2np2

, 5. The number of completely filled orbitals in a ground state selenium (Se)
atom is:

a) 16
b) 17
c) 10
d) 15
e) 9

6. The quantum number "l" best describes the:

a) spin of the electron
b) principal energy level
c) shape of the orbital
d) orientation of the orbital
e) the energy of the electron

7. Which of the following historical attributions is INCORRECT?

a) Millikan - measured electron charge
b) DeBroglie - postulated wave nature of electron
c) Bohr - experimentally established nuclear model of the atom
d) Thomsen - measured charge/mass ratio of electron
e) Einstein - explained photoelectric effect

8. Which of the following electron configurations is INCORRECT?

a) Ca, 1s22s22p63s23p64s2
b) Br, 1s22s22p63s23p64s23d104p5
c) O, 1s22s22p4
d) Cr, 1s22s22p63s23p63d54s1
e) all are correct