21 which is the most stable resonance structure for

21. Which is the most stable resonance structure for [OCSN]
3-
? The electronegativities for S
and N are 2.5 and 3.0, respectively.
(a)
C
S O
N
:
:
..
..
.. ..
:
..
(b)
C
S O
N
:
:
..
..
.. ..
:
:
(c)
C
S O
N
:
:
..
..
.. ..
:
:
(d)
..
C
S O
N
:
:
..
..
.. ..
:
:
(e)
..
C
S O
N
:
:
..
.. ..
:
22. In the CN bond of the molecule below, the C-N sigma bond(s) results from overlap of
________ orbitals and the pi bond(s) results from overlap of ______________ orbitals,
respectively.
C N
H
H
..
sigma pi
H
(a) N sp with C sp
2
hybrid N p with C p
(b) N sp with C sp
2
hybrid N sp with C sp
2
hybrid
(c) N sp
2
with C sp
2
hybrid N p with C p
(d) N sp with C sp hybrid N p with C p
(e) N p with C p N sp with C sp
2
hybrid

Chemistry 107 Examination 2(A), November 2, 2012 page 10 of 12
23. Which of the following is the order of increasing ionization energy in the gas phase?
24. Which of the following correctly describe the hybridization of the indicated atoms?
(1) Cl is sp
2
..
.. ..
..
:
:
F
Cl F
F
:
:
..
.. ..
(2) B is sp
2
B
F
F
F
(3) P is sp
3
d
P
F
F
F
F F
(4) Xe is sp
2
d
3
:
..
..
Xe
..
..
:
:
F
..
..
F
..
F
:
..
F
: :
(5) S is sp
3
:
..
..
..
..
..
O
O
S
:
..
..
..
..
..
O
O
S