Draw the Lewis dot structures for the following molecules
a) NH3
b) H2S
c) PH3
d) C2H6
e) PCl5
f) F2
- Count the number of covalent bonds present in the above molecules.
Answers
Explanation:
a)NH3: H
.
×
H. ×N× .H
→ H
|
H—N—H No. of covalent bonds:- 3
.. No. of lone pairs:- 1
b)H2S: H. ×S× .H
..
→ H—S—H No. of covalent bonds:- 2
.. No. or lone pairs:- 2
c)PH3: H
.
×
H. ×P× .H
→ H
|
H—P—H. No. of covalent bonds:- 3
.. No. of lone pairs:- 1
d)C2H6: H H
. .
× ×
H. ×C× ×C× .H
× ×
. .
H H
→ H H
| |
H—C—C—H
| |
H H No. of covalent bonds:- 7
No. of lone pairs:- 0
e)PCl5: ..
:Cl:
.
.. × ..
:Cl. ×P× .Cl:
.. × × ..
. .
:Cl:. :Cl:
.. ..
..
→ :Cl:
.. | ..
:Cl—— P ——Cl:
.. | | .. No. of covalent bonds:- 5
:Cl: :Cl: No. of lone pairs:- 0
.. ..
f)F2: .. ..
:F. .F:
.. ..
.. ..
→ :F—F: No. of covalent bonds:- 1
.. .. No. lone pairs:- 3
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