C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)
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Transcript of C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)
![Page 1: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/1.jpg)
C. Mark Zheng © 2008. All rights reserved.
How to Draw Lewis Dot Structures(Demo)
![Page 2: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/2.jpg)
C. Mark Zheng © 2008. All rights reserved.
How to Draw Lewis Dot Structures(Demo)
Hydrogen Cyanide (HCN)
![Page 3: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/3.jpg)
C. Mark Zheng © 2008. All rights reserved.
Step 1: Identify the central atom and draw the outer atoms around it.
![Page 4: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/4.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
![Page 5: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/5.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
Carbon is the central atom
![Page 6: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/6.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
C
![Page 7: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/7.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH
![Page 8: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/8.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
![Page 9: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/9.jpg)
C. Mark Zheng © 2008. All rights reserved.
Step 2: Connect each outer atom to the central atom using a dash.
![Page 10: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/10.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
![Page 11: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/11.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
![Page 12: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/12.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
![Page 13: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/13.jpg)
C. Mark Zheng © 2008. All rights reserved.
Step 3: Count the total number of valence electrons.
.
![Page 14: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/14.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
![Page 15: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/15.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
H = 1 e-
![Page 16: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/16.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
H = 1 e-
C = 4 e-
![Page 17: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/17.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
H = 1 e-
C = 4 e-
N = 5 e-
![Page 18: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/18.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
H = 1 e-
C = 4 e-
+ N = 5 e-
![Page 19: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/19.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
H = 1 e-
C = 4 e-
+ N = 5 e-
![Page 20: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/20.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
H = 1 e-
C = 4 e-
+ N = 5 e-
Total = 10 e-
![Page 21: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/21.jpg)
C. Mark Zheng © 2008. All rights reserved.
Step 4: Fill each outer atom with electrons such that the outer atoms obey the octet rule.
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
![Page 23: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/23.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Hydrogen
![Page 24: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/24.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Hydrogen
![Page 25: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/25.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Hydrogen
1
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Hydrogen
1 2
![Page 27: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/27.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Hydrogen full (2e- max for H)
1 2
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 2
![Page 29: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/29.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 2
![Page 30: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/30.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 1 2
![Page 31: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/31.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 21 2
![Page 32: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/32.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen need 6 more
1 21 2
![Page 33: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/33.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 23●1 2
![Page 34: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/34.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 23 4● ●1 2
![Page 35: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/35.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 23 4
5
● ●●1 2
![Page 36: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/36.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 23 4
5
6
● ●●●
1 2
![Page 37: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/37.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 23 4
5
6
● ●●●
7●
1 2
![Page 38: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/38.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N
Nitrogen
1 23 4
5
6
● ●●●
8 7●●
1 2
![Page 39: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/39.jpg)
C. Mark Zheng © 2008. All rights reserved.
Step 5: Apply leftover electrons to the central atom.
![Page 40: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/40.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N1 23 4
5
6
● ●●●
8 7●●
H = 1 e-
C = 4 e-
+ N = 5 e-
Total = 10 e-
1 2
![Page 41: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/41.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N1 23 4
5
6
● ●●●
8 7●●
H = 1 e-
C = 4 e-
+ N = 5 e-
Total = 10 e-
used = 10 e-
1 2
![Page 42: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/42.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N1 23 4
5
6
● ●●●
8 7●●
H = 1 e-
C = 4 e-
+ N = 5 e-
Total = 10 e-
- used = 10 e-
1 2
![Page 43: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/43.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N1 23 4
5
6
● ●●●
8 7●●
H = 1 e-
C = 4 e-
+ N = 5 e-
Total = 10 e-
- used = 10 e-
1 2
![Page 44: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/44.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N1 23 4
5
6
● ●●●
8 7●●
H = 1 e-
C = 4 e-
+ N = 5 e-
Total = 10 e-
- used = 10 e-
left = 0 e-
1 2
![Page 45: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/45.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N1 23 4
5
6
● ●●●
8 7●●
H = 1 e-
C = 4 e-
+ N = 5 e-
Total = 10 e-
- used = 10 e-
left = 0 e-
1 2
No (zero) electron go on the central atom (C)
![Page 46: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/46.jpg)
C. Mark Zheng © 2008. All rights reserved.
Step 6: Check each atom to see if the octet rule is obeyed.
![Page 47: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/47.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N1 23 4
5
6
● ●●●
8 7●●
1 2
![Page 48: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/48.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N1 23 4
5
6
● ●●●
8 7●●
1 2
We the electrons were assigned to the outer atoms, we made sure they obey the octet rule; therefore we need only check the central atom – carbon.
![Page 49: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/49.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
![Page 50: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/50.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
1
![Page 51: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/51.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
1 2
![Page 52: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/52.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
1 2 3
![Page 53: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/53.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
1 2 3 4
![Page 54: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/54.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
1 2 3 4
4
![Page 55: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/55.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
1 2 3 4
4 X
![Page 56: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/56.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
1 2 3 4
4 X – Does NOT obey the octet rule
![Page 57: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/57.jpg)
C. Mark Zheng © 2008. All rights reserved.
Step 7: Move a pair of non-bonding (or lone pair) electrons from the outer atom to form a new bond with the central atom.
![Page 58: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/58.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
![Page 59: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/59.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
●●
![Page 60: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/60.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
![Page 61: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/61.jpg)
C. Mark Zheng © 2008. All rights reserved.
Check Octet Rule Again
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
1
![Page 63: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/63.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
1 2
![Page 64: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/64.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
1 2 3
![Page 65: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/65.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
1 2 3 4
![Page 66: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/66.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
1 2 3 4
5
![Page 67: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/67.jpg)
C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
1 2 3 4
5 6
![Page 68: C. Mark Zheng © 2008. All rights reserved. How to Draw Lewis Dot Structures (Demo)](https://reader036.fdocuments.us/reader036/viewer/2022070401/56649f1b5503460f94c31585/html5/thumbnails/68.jpg)
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Hydrogen Cyanide (HCN)
CH N● ●
●●
1 2 3 4
5 6
6
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
1 2 3 4
5 6
6 X
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
1 2 3 4
5 6
6 X – Does NOT obey the octet rule
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N● ●
●●
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
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Check Octet Rule Again
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
4 bonds around carbon = 8 e-
+ 0 lone pair e- around carbon = 0 e-
valence electrons around carbon = 8 e-
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
4 bonds around carbon = 8 e-
+ 0 lone pair e- around carbon = 0 e-
valence electrons around carbon = 8 e-
Octet rule is obeyed!
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Step 8 & 9: Check and minimize formal charge on all atoms.
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Step 8 & 9: Check and minimize formal charge on all atoms.F.C. = (normal # of valence e-) – (# non-bonding e- + ½ # of bonding e- )
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
Atom Normal # of Valence
electrons
# of non-bonding electrons
# of bonding electrons
Formal Charge
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
H = 1 - ( 0 + ½ (2) ) = 0
Atom Normal # of Valence
electrons
# of non-bonding electrons
# of bonding electrons
Formal Charge
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
H = 1 - ( 0 + ½ (2) ) = 0 C = 4 - ( 0 + ½ (8) ) = 0
Atom Normal # of Valence
electrons
# of non-bonding electrons
# of bonding electrons
Formal Charge
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
H = 1 - ( 0 + ½ (2) ) = 0 C = 4 - ( 0 + ½ (8) ) = 0 N = 5 - ( 2 + ½ (6) ) = 0
Atom Normal # of Valence
electrons
# of non-bonding electrons
# of bonding electrons
Formal Charge
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
CH N ●●
H = 1 - ( 0 + ½ (2) ) = 0 C = 4 - ( 0 + ½ (8) ) = 0 N = 5 - ( 2 + ½ (6) ) = 0
All Formal Charges Minimized!
Atom Normal # of Valence
electrons
# of non-bonding electrons
# of bonding electrons
Formal Charge
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Hydrogen Cyanide (HCN)
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
Final Structure
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
Final Structure
CH N ●●
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C. Mark Zheng © 2008. All rights reserved.
Hydrogen Cyanide (HCN)
Final Structure
CH N ●●