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Quickie Quiz - Structure & Properties- B
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Section I - Multiple Choice - Identify the choice that best completes the statement or answers the question.
(18 x 1 pts. = 18 pts.)
1. An electron has the following set of quantum numbers; n = 4, l = 2 , m = 0 and s = +1/2.
In which of the following orbitals would this electron be found?
a) 4s
2.
3.
6.
d) 4f
e)
none of these
1s22s22p62d103s23p63d4
b) 1s22s22p63s23p63d104s24p2
c)
1s22s22p63s23p64s24p24d10
d) 1s22s22p62d103s23p64s24p2
e)
1s22s22p63s23p64s24p64d6
Which of the following subshells has room for a maximum of 6 electrons?
4p
b) 6p
c)
3s
d) 4f
e)
5d
Who proposed that electrons can only make certain energy level jumps?
Bohr
b) Moseley
c)
Rutherford
d) Schroedinger
e)
Thomson
Which of the following sets of quantum numbers is not possible?
a)
n = 3,
l = 0,
m = 0,
s = +1/2
b) n = 5,
l = 3,
m = 0,
s = +1/2
c)
n = 5,
l = 3,
m = -1
s = -1/2
d) n = 4,
l = 3,
m = -3,
s = -1/2
e)
n = 4,
l = 4,
m = +2,
s = -1/2
The electron configuration of the chloride ion, Cl-, can be described by
a)
1s22s22p63s23p4
d) 1s22s22p63s23p3
7.
4d
a)
a)
5.
c)
The complete electronic configuration of Ge is
a)
4.
b) 4p
b) 1s22s22p63s23p6
e)
c) 1s22s22p63s23p5
1s22s22p63s43p6
The electron configuration that represents a reactive nonmetallic element is
a) 1s22s22p63s1
d) 1s22s22p63s23p6
b) 1s22s22p63s23p1c)
e) 1s22s22p63s23p64s2
c) 1s22s22p63s23p5
8.
The maximum number of electrons at n = 3 is
a)
9.
2
b) 4
c)
8
d) 18
e)
32
d) 32
e)
none of these
The number of orbitals available at n = 4 is
a)
4
b) 8
c)
16
10. Which is not true of the 'p' orbitals?
a)
they are dumbbell shaped
b) they are oriented about 3 axes
c)
they are found in all energy levels
d) they may contain a total of 6 electrons
e)
they represent a region of probability of finding an electron
11. Which of the following ground state electron configurations will most likely represent an alkali metal?
a)
1s2 2s2 2p6 3s2 3p4
b) 1s2 2s2 2p6 3s2 3p6 4s1
c)
1s2 2s2 2p6 3s2 4s2 3d10
d) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2
12. The first row of the transition elements corresponds to the filling of which subshell?
a)
3d
b) 3f
c)
4d
d) 4f
e)
4p
13. Which ion below has the same electron configuration (ie. isoelectronic) as Ca2+?
a)
Li+
b) Cl-
c)
Be2+
d) S2-
e)
Mg2+
14. Which of the following represents the electron configuration of an excited atom?
a)
1s2 2s2 2p6
b) 1s2 2s2
c)
1s2 2s2 2p6 3s1
d) 1s2 2s2 2p6 3s2
15. The valence electron configuration in atoms of element X is 2s2 2p4 and in those of element Z
is 4s2 4p1 . The probable empirical formula for the compound formed from these elements is
a)
XZ2
b) X2Z
c)
XZ
d) X2Z3
e)
Z 2X 3
e)
40
16. Consider the orbital diagram
↑↓ 1s ↑↓ 2s ↑↓↑↓↑↓ ↑↓ ↑↓↑↓↑↓ 2px 2py 2pz 3s 3px 3py 3pz
The species that does NOT have this orbital occupancy pattern is
a)
40
18
Ar
b)
34
16
S
c)
37
17
C1 -
d)
39
19
K+
20
Ca 2+
e)
1s2 2s1 2px 1
17. The number of half-filled orbitals in the valence shell of a sulfur atom in its ground state is
a)
1
b) 2
c)
3
d) 0
e)
4
18. In which of these pairs do both have the identical electron configuration?
a)
Li, Rb
b) Mg2+, O2-
c)
F-, Ca2+
d) Ne, Ar
e)
Sr2+, Ca2+
Section II - Short Answer – Answer in the space provided
1. What causes atomic line spectra? Include a diagram in your explanation.
(1 pt.)
2. What is the difference between an "orbit" as described in the Bohr-Rutherford model of the atom and an
"orbital" as described in the quantum mechanical model of the atom? (1 pt.)
3.
Draw the noble gas notation electron configuration (ex. [Xe]3s2p5 ) for Nickel, Ni. (1 pt.)
4. Write the orbital notation (or orbital diagram)
↑↓↑↓↑↓ 3px 3py 3pz
for the Al3+ ion. (1 pt.)
5. Using the (spd) electron configuration for Pb, explain why it forms two different ions, Pb2+ and Pb4+. (1 pt.)
6. Explain one anomalous electron configuration in the periodic table. (1 pt.)
7. Select three of the scientists listed, and briefly describe their contributions to quantum theory. (3 pts.)
Planck, Einstein, Dalton, Bohr, Schroedinger, deBroglie, Heisenberg
8. State the 4 possible quantum numbers for the outermost electron in Rubidium. (1 pt)