Lecture 14: Lewis Structures

Question 1

types of valence electrons

Answer 1

bonding electrons, lone pairs

Question 2

Bond Order & Length Relationship

Answer 2

Higher bond order = shorter length

Question 3

Bond Order & Strength Relationship

Answer 3

Higher bond order = stronger bond

Question 4

Bond Energy definition

Answer 4

energy needed to break 1 mole of covalent bonds in the gas phase

Question 5

Bond Strength & Atom Size Relationship

Answer 5

smaller atoms = stronger bond

Question 6

Bond Length & Atom Size Relationship

Answer 6

smaller atoms = shorter length

Question 7

what is different between resonance structures

Answer 7

arrangement of electrons, not atoms

Question 8

delocalization is

Answer 8

the idea that electrons are spread across more than 1 bond (a single and double are really both 1.5)

Question 9

Bond Order calculation

Answer 9

pairs of bonding e / # of bonding positions

Question 10

Why do we use Lewis Structures?

Answer 10

good way of predicting bonding & structure

Question 11

how do you decide which atoms goes in the center?

Answer 11

least electronegative (besides H)