Question 1

The wavelength of light that has a frequency of 1.20 × 10^13s^-1 is __________ m.

Accepted Answer

2.50x10^-5

Question 2

The energy of a photon of light is __________ proportional to its frequency and __________
proportional to its wavelength.

Accepted Answer

directly, inversely

Question 3

The energy of a photon that has a wavelength of 12.3 nm is __________ J.

Accepted Answer

1.62x10^-17

Question 4

The energy of a photon that has a wavelength of 12.3 nm is 1.62 × 10-17 J. The energy of a
photon of wavelength 24.6 nm is__________.

Accepted Answer

0.81x10^-17

Question 5

The energy of a photon that has a frequency of 8.21 × 1015 s-1 is __________ J.

Accepted Answer

5.44x10^-18

Question 6

The energy of a photon that has a frequency of 8.21 × 1015 s-1 is 5.44 × 10-18 J. The energy of a
photon of frequency 16.42 × 1015 s-1 is ________.

Accepted Answer

10.88x10^-18

Question 7

Of the following transitions in the Bohr hydrogen atom, the __________ transition results in the
emission of the highest-energy photon.
n = 1 → n = 6
n = 1 → n = 4
n = 6 → n = 3
n = 6 → n = 1
n = 3 → n = 6

Accepted Answer

n=6 to n=1

Question 8

An electron cannot have the quantum numbers n = __________, l = __________, ml =
__________.
3, 1, -1 
2, 0, 0 
1, 1, 1 
2, 1, -1 
3, 2, 1

Accepted Answer

1,1,1

Question 9

Which set of three quantum numbers (n, l, ml) corresponds to a 3d orbital?
3, 3, 2 
3, 2, 3 
2, 3, 3 
2, 1, 0 
3, 2, 2

Accepted Answer

3,2,2

Question 10

Which one of the following represents an acceptable possible set of quantum numbers (in the
order n, l, ml, ms) for an electron in an atom?
2, 2, 0, 1/2
2, 0, 2, +1/2
2, 1, 0, 0
2, 0, 1, -1/2
2, 1, -1, 1/2

Accepted Answer

2,1,-1,1/2

Question 11

Which one of the following represents an impossible set of quantum numbers for an electron in
an atom? (arranged as n, l, ml, and ms)
2, 1, -1, -1/2
1, 0, 0, 1/2
5, 4, - 3, 1/2
3, 3, 3, 1/2
5, 4, -3, -1/2

Accepted Answer

3,3,3,1/2

Question 12

Which of the following is a valid set of four quantum numbers? (n, l, ml, ms)
1, 1, 0, -1/2
2, 1, 0, +1/2
2, 2, 1, -1/2
1, 0, 1, +1/2
2, 1, +2, +1/2

Accepted Answer

2,1,0,+1/2

Question 13

In general, as you go across a period in the periodic table from left to right:
(1) the atomic radius __________;
(2) the electron affinity becomes __________ negative; and
(3) the first ionization energy __________.

Accepted Answer

decreases, increasingly, increases

Question 14

The most common sulfur ion has a charge of __________.

Accepted Answer

-2

Question 15

Electrons in the 1s subshell are much closer to the nucleus in Ar than in He due to the larger
__________ in Ar.

Accepted Answer

nuclear charge

Question 16

Atomic radius generally increases as we move __________.

Accepted Answer

down a group and from right to left across a period

Question 17

Which of the following correctly lists the five atoms in order of increasing size (smallest to
largest)?
F < Ge < Br < K < Rb
F < K < Ge < Br < Rb
F < K < Br < Ge < Rb
F < Br < Ge < K < Rb
F < Br < Ge < Rb < K

Accepted Answer

F < Br < Ge < K < Rb

Question 18

Which equation correctly represents the first ionization of aluminum?
Al (g) → Al- (g) + e-
Al (g) → Al+ (g) + e-
Al- (g) → Al (g) + e-
Al+ (g) + e- → Al (g)
Al (g) + e- → Al- (g)

Accepted Answer

Al (g) → Al+ (g) + e-

Question 19

Which of the following correctly represents the second ionization of phosphorus?
P- (g) + e- → P2- (g)
P+ (g) + e- → P (g)
P+ (g) → P2+ (g) + e-
P+ (g) + e- → P2+ (g)
P (g) → P+ (g) + e-

Accepted Answer

P+ (g) → P2+ (g) + e-

Question 20

Which ion below has the largest radius?
Cl- 
F- 
K+ 
Br- 
Na+

Accepted Answer

Br-

Question 21

Which isoelectronic series is correctly arranged in order of increasing radius?
K+ < Ca2+ < Ar < Cl-
Ca2+ < K+ < Cl- < Ar
Ca2+ < Ar < K+ < Cl-
Cl- < Ar < K+ < Ca2+
Ca2+ < K+ < Ar < Cl-

Accepted Answer

Ca2+ < K+ < Ar < Cl-

CHE 201 Ch 8 and 9

Practice Test Review Ch 8 and 9

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