1
CHEM 6A
SAMPLE QUESTIONS EXAM2
1.
Among the following, P
3–
, Cl
–
, K
+
, Cl, N
3–
the one with the largest atomic radius is:
a) P
3–
b) Cl
–
c) K
+
d) Cl
e) N
3–
2.
Which of the following has a ground state configuration of [Kr] 5s
2
4d
10
?
a) In
+
b) Ag
+
c)Pd
d) Sn
4+
e) nonof the previous
3.
The number of electrons that can reside in the n=5 shell is: a) 50
b)80
c)36
d)72
e)2
4.
What is the longest wavelength associated with the Lyman series in hydrogen?
a) 610 nm
b)465 nm
c) 657 nm
d)122 nm
e) 223 nm
5.
Which of the following is a legitimate (i.e. allowed) set of
n, l, m
l
,
and
m
s
quantum numbers?
a)
4, 3, 0, 1
b)
4, 2, 3, ½
c)
4, 4, 3, ½
d)
4,
−
2,
−
1, ½
e)
4, 0, 0,
−
½
6.
Of the following 5 elements, which has the
greatest
number of
unpaired
electrons:
Al, S, Cl, P, Si
a)
Cl
b)
Al
c)
P
d)
Si
e)
S
7.
When Light of wavelength 400 nm strikes the surface of metallic cesium electrons with kinetic energy of
1.54x10
19
J are ejected. The work function of the metal in joules is:
a)
3.43x10
19
b)
3.25x10
18
c)
2.91 x 10
19
d)
7.5x10
14
e)
4.97x10
19
8.
What is the de Broglie wavelength of a
baseball
of mass 0.17 kg traveling at a velocity of 30 m / s ?
a)
1.52x10
10
m
b)
2.8x10
30
m
c)
1.52x10
29
m
d)
2.80x10
19
m
e)
1.3 x 10

34
m
9.
Of the following, the atom with the greatest
electron affinity is the one with the electron configuration:
a) 1s
2
2s
2
2p
6
3s
2
3p
4
b) 1s
2
2s
2
2p
6
3s
1
c) 1s
2
2s
2
2p
6
3s
2
3p
3
d)
1s
2
2s
2
2p
6
3s
2
3p
5
e) 1s