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Na
k
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se Br
Chapter 2 化學鍵結
AH -C=CH
升二技插大
3.
Brigma
The bond between the carbon atoms in acetylene (HCCH) consists
of
)
(A)6 pi electrons (B)4 pi and 2 sigma electrons (C)6 sigma
electrons (D)2 pi and 4 sigma electrons (E)3 pi and 3 sigma
B)
B
7.(BCDE)
electrons.
【84 成大化學)
14.(B)
20.(C)
4.
E )
(A)NO;
[83 中興A]
Which of the following has a triple bond?
(B)O2 (C)C12 (D)CO;
(E)CN-.
Which one of the following element pairs has the lowest electronegativity
(B) 27.(D)
34. (C)
C) 41.(CD)
1 G
difference and thereby is the least polan? Få 10 323.49
B)
(84 5% *ILI)
-)
48. (A)
6.
NET
2
>
2
D)
58. (D)
62. (B)
69. NO+
D
Obind (219)
O
发
(A)SeF (B)Seci (QKBr (D/NaCl (E)KAT.
11
The compound Sio does not exist as a discrete molecule while CO2
does. This can be explained because
ly 2 ep 3
15 aly zp
(A)the Si–O bond is unstable (B)The Lewis structure of SiO has
an even number of electrons (C)The SiO2 is a solid while CO, is
a gas (D)the 3p orbital of the Si has little overlap with the 2p of
the 0 (E)none of the these.
V MOJT 515
1
- 4 40 (成大】
Yi (4 0 atom) (86 58*A]
7.
In order to explain the valence observed for many of the elements 0 -Si-O
in terms of electron configurations, it is often useful to look at
electronis staies slightly different from the ground state in comparing 0-41-0
the ground state of boron with the state more useful to describe
0
bonding, the number of unpaired electrons goes from
(A)1 to 2 (B)1 to 3 (C)3 to 4 (D)3 to 5 (E)none of the above.
(集
(80 清大B)
Which of the following compounds should not exist?
( (,
【85 成大A】
alf 566-32
Cle
32-8-24
2-89
cild
14
1
he atoms
83 中興A)
mm
bove.
B 29 p. 1 1 be a )
\CHE
> ?
(A)Na,P (B)(NH4),PO, CIPO. DPH xH)POCI,,
Maspal sput
中興A]
Pa zorgt
O
15412 = 1)
O-P- 5 5+12= 1)
10-4 - 13
13-12=1
--
cl-P-0
