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Chemistry, 7/e
Raymond Chang, Williams College
Quantum Theory and the Electronic Structure of Atoms

Self Assessment B



1

What is the frequency of electromagnetic radiation with a wavelength of 562 nm?
A)1.87 x 10-15 Hz
B)5.33 x 1014 Hz
C)5.34 x 105 Hz
D)1.87 x 108 Hz
2

How many photons of light having a wavelength of 656 nm are necessary to provide 1.0 J of energy?
A)3.52 x 10-28
B)3.03 x 10-19
C)2.84 x 1027
D)3.30 x 1018
E)None of the above.
3

Which of the following sets of quantum numbers is not allowed?
A)n = 2, l = 2, ml = 0
B)n = 3, l = 1, ml = -1
C)n = 2, l = 0, ml = 0
D)n = 3, l = 2, ml = 0
E)n = 2, l = 1, ml = 1
4

The set of quantum numbers that correctly describes an electron in a 3s orbital is:
A)n = 3; l = 0; ml = 0; ms = 0
B)n = 3; l = 2; ml = -2, -1, 0, 1, or 2; ms = +1/2 or -1/2
C)n = 3; l = 1; ml = -1, 0, or 1; ms = +1/2 or - 1/2
D)n = 4; l = 0; ml = -1, 0, or 1; ms = +1/2 or -1/2
E)None of the above.
5

A neutral atom in its ground state contains 30 electrons. This element is considered a __________ element, and has _______ electrons in orbitals with l = 2.
A)transition, 8
B)actinide, 10
C)representative, 10
D)lanthanide, 10
E)transition, 10
6

An atom in its ground state contains 18 electrons. How many of these electrons are in orbitals with l = 0?
A)2
B)4
C)6
D)8
E)10
7

The electronic configuration for K is
A)1s22s22p63s23p64s03d1
B)1s22s22p63s23p64s2
C)1s22s22p63s23p63d64s1
D)1s22s22p63s23p64s1
E)None of the above.
8

An aluminum atom has ____ unpaired electron(s).
A)4
B)1
C)7
D)0
E)3
9

The fact that no two electrons in an atom have the same four quantum numbers is a reflection of
A)Hund's rule.
B)the dual nature of the electron.
C)the photoelectric effect.
D)the Heisenberg uncertainty principle.
E)the Pauli Exclusion principle
10

The unusual electron configuration of Mo indicates the
A)unusual stability of half-filled d-orbitals.
B)unpredictability of the electron filling patterns of the non-representative elements.
C)unusually large size of Mo atoms.
D)greater than expected electronegativity of Mo.
E)B and C.








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