Download Lewis Structures: Identifying Valence Electrons and Drawing for Atoms, Ions, and Molecules and more Study Guides, Projects, Research Chemistry in PDF only on Docsity!
LewisStluctures
"Everything
startsftom a dot."
1.Foreachatomor ionbelow,writethenumberof
valence electrons
anddrawthe
LewisSymbol.
CI
. .t:
Brl-
(
r'
)r-
)lg-:'
L
o.
co
re)
: Q=O:
l-/
'
,\
Al3*
A\
3ts
Nz@
N:
U
- Drawthe LewisStructurefor eachdiatomicmoleculeor ionbelow Startby
identifyingthe numberof valenceelectrons.
Hz@
lJ-L+
oHt-
(
,.
):o-
L"
rilz€\
-__V
'l'-
t+l
J
CN1-@
z-
C
/'q-
= u
(_
co2-
-----:,
bs'\gi
I
rar I
I
,r
I
\
rJ
^)r-
l
f..
|
:c
lt
Lro
page 1 of 8
Drawthe lewisstructurefor eachpofiabrniarnsboje s ion below. t CzH+
If_
I c-: c- I
SCCIz HNBTF
LL-
-r+ HCOzH ll -Q:O I
'. Ol
I
t.l
CH:CHCHz . rl t+ t.- "t
=c-
I
l+
page2 of 8 BrOH q) -n- l* Dr .r' (r CzHz tr ,l I I t+ -rv I I , lll rll t.
:S
.tl
tr n lcl tl -ct I -Er I
t-\
t+
\
\L- c
t
+ FNCHz
1Fl
I u=c-t+
'r
I
r+ H:Or* + 't -u' I l+
- Drawthe lewisstrucfrrefs ed
in the 3rd periodand belowmay
IBr:
ll
8r
i
J
!r
-r
-Br:
..-t
-J-
| |4-a
r
r-.r
..
.t
2,fu
XeFr
':
,
q@'
!l-,
"af7"
re\
.
r
.F,
tPl
.\ cl
r.'..-
/
I
-.
.
,/ ,
-u,
'
,
(-I 'Ct
PCls
uoa-
,L,.
SO+2-
POCI:
D
tL
-o
l{c'
.
rl-
l-
,t'.-"
tg
tl
-ct
ll
rol
'l
.^
D:N(
'l
rA
tL/
\ |
ll
O.-N
trl
I
lD
a
CIO+1-
(-> '->
4
r
(4,
-(_)
t\
a'r I
"?o
-i
I
'-t
\
__)
- Thenitrategn (NOs1)hasthreepossible
lewisstructures.Draweachandassign
formalcharg'eto all atomsin the structures.
Lf
-t
c
ll
lo
page4 of I
- Drawat least tvvoresonance structureof eachmolecule.below.
structuresof andassign formal chargeto eachatomin the structures. circlethe
(
rl
L)=
ar
+> i l'r
'"
o
fv
q
l..J
@
=O
j N
=c *t,
c- =Q
(,
o^ro^
htrF
clcr{- aaXah.
oc,,**\
b.
Theisocyanate ion (CNOI-) hasa skeleton of C-N-O.Drawthreeresonance
structuresof andassign formalcharge to eachatomin the structures. circlethe
v
.,
e> ,'C- U-
It
c. Whichismorestable, the ionyoucircled in (d)or the ionyoucircled in (b)?
Why?
'i
tl
hes
(--)
(r**
1e2,,+ue\
5U
rFil
,
.4s\
ohsil
page 5 of I
CA\
A,^"J oL
e
bxL
?>/h-
o[ &\ rd
leg
(21,q
mgvs J.
eQ^^S*
rlr
e(e"ao"{a
t
I t*,
ll
-l
12.The sulfurdioxidemolecule
(SOz)
has
t.-o I
l-
3::|tYl"j"rt[3'
charseto eachatominthe_structures.effi t|e modstqb|e€tfE6\
Q
,o,,
;6 ,*- ,;Y
/
lg,'
\
@,i
<-) J,@.-"
@!'
l: ,
l
--
I
t
l\
|
1r
I
lOr
lOt
,O;
:O: /
9!s
b
-.
/
'- -t"tlo4L
= 2'P
'Lll-'t
)i'T tr',*2f;:
'
'b
%
hev'
./ *r^."/rlhy
3.Drawat
least sixresonancestructure$tHzNOzl-.Assignformalcharge to eacn j(
a5Y
atomin thestructure
(other
thanH). Circlethemoststablestructureor structures.
(
i
't' .,
,1-
-c--ru-'-oi@
\ 9
6-e -
^'r-o
a,-
g
J
L-g>
@^*J
(
,br
)r
-d:o,@ \ \
rr+
(
'\
r
.:
-.,\
X-'/
t'+-9-r'r:o:=\
c--,-l-J
-'?
r-
) ,/ L
@
I
-f;
ip.
i+
L-J
xi*
$;l
q.{i
&uu'
-.o
'I
.
I tL{.t V
1
-n"Jo"C+$|
IJ
(
E --q,
Daqe
7 of 8
(-_
et paylJ
+ob
l,
Czrta6+
AeQ
*r
4.Draw
nitrogen
pmand
(a)
rbn below.Thenitrogen-
d418 kJ/mol;in
(b)it's
r"iHzNNHz
lN
=
l.J:
tl
N
\r+
tf
1r")=-
/
k
lS.Consider
thethree structuresinthequestion
above.
(a)Aretriple
bondsronger or shorter thandoubre bonds? whatabout
singre
bondsrelative to doublebonds?
wJ
l*{:
-t-aL"
< b41e
<
.
(b)
:^lj:yb]-:
bondtwiceas
strongas a singte bond?Dothreesingte-bonds
noto asmuch energy asonetriple bond?
).1",
pJo,Nst%A
e,e
"
-lL-r-g^tb
)
' b,*- *uy"w
,ots l.*c <h(-
]>14;
Nor' .t+pk \d.r
?.<
E{,^a.;}
s\r/,
bu+.J^ry
ar
n^t- ?e
\
s +1^,*,
nV
paseaof B
*r^/5,
