represent each of the following atoms using Lewis notation (a) beryllium (b)calcium chloride (cacl2 (c) carbon dioxide
Answers
Answer:
Lewis Notation of :
a) Bromine gas :-
(
B
r
2
)
Atomic number
=
35
Electronic configuration :-
1
S
2
2
S
2
2
P
6
3
S
2
3
P
6
4
S
2
3
d
10
4
P
5
Valence electronic configuration
=
4
S
2
4
P
5
Lewis Notation of Beryllium atom is
[
:
¨
B
r
.
]
Two Bromine atoms combine to form
(
B
r
2
)
gas
Bromine
(
B
r
2
)
gas
b) Calcium chloride :-
C
a
C
l
2
C
a
C
l
2
molecule has two chloride atoms and one calcium atom
atomic number of calcium is
20
electronic configuration is
1
S
2
2
S
2
2
P
6
3
S
2
3
P
6
4
S
2
Valence electronic configuration is
4
S
2
Atomic number of chloride is
17
.
Electronic configuration is
1
S
2
2
S
2
2
P
6
3
S
2
3
P
5
Valence electronic configuration is
3
S
2
3
P
5
Lewis Notation of calcium is
[
⋅
C
a
⋅
]
C
o
less two electrons and becomes
C
a
2
+
.
Lewis Notation of chloride is
[
∗
¨
C
l
∗
]
each chloride gains as election and becomes
C
l
−
.
C) Carbon dioxide :
(
C
O
2
)
Carbon dioxide molecule consists of two oxygen atoms and one carbon atoms. Atomic number of carbon atom is
6
.
Electronic configuration is
1
S
2
2
S
2
2
P
2
Valence electronic configuration is
2
S
2
3
P
2
Lewis notation is
[
˙
⋅
C
⋅
]
Atomic number of oxygen atom is
8
electronic configuration is
1
S
2
2
S
2
2
P
4
Valence electronic configuration is
2
S
2
2
P
4
.
Lewis notation is
[
¨
:
O
⋅
]
Carbon dioxide will be formed as :-
d) Among the given molecules only
C
O
2
contains a double bond between a carbon atom and oxygen atom.