Lewis Structure

Question 1

Does covalent bond formation increase or decrease potential energy ?

Answer 1

decrease

Question 2

What are the steps to do the Lewis Structure ?

Answer 2

1. calculate total valence e- (use group #):
   - for cations: remove e-
   - for anions: add e-
2. calculate # of bonds it forms (also use group # BUT):
   - Group 15: 3-5
   - Group 16: 2
   - Group 17: 1
3. game time

*make sure to double-check once completed !!

Question 3

Practice: Lewis Structure

C2 H6 O

Answer 3

1. (2 x 4) + (6 x 1) + (6) = 20 ve-
2. bonds: C: 4, H: 1, O: 2
3. search it up (idk how to put it here) :pp

Question 4

What are alkenes ?

Answer 4

Hydrocarbons

Question 5

What is a sigma and pi bond ?

Answer 5

• sigma: single bond; allows rotation
• pi: any other bonds; doesn’t allow rotation (would break it)

Question 6

How to find Hybridization ?

Answer 6

1. count all # of atoms - lone pairs (BONDED TO CENTRAL)
2. answer: 4 = sp^3
   3 = sp^2
   2 = sp

Question 7

Practice: Lewis Structure:

C2 H4

Answer 7

1. (2 x 4) + (4 x 1) = 12 ve-
2. bonds: C: 4, H: 1
3. search it up (idk how to put it here) :pp

Question 8

Practice: Lewis Structure:

-OH

Answer 8

1. (6) + (1) + 1 (anion) = 8 ve-
2. bonds: O: 2, H: 1
3. search it up (idk how to put it here) :pp

Question 9

What makes structural isomers ?

Answer 9

Different connections b/w the same # of atoms of e/a type

Question 10

What forms a pi bond ?

Answer 10

overlap of unhybridized p orbitals