Chapter 1.8: Resonance

Question 1

Define contributing structures (resonance structures or resonance contributors)

Answer 1

representations of a molecule or ion that differ only in the distribution of valence electrons

Question 2

Define double-headed arrows

Answer 2

a symbol used to show that structures on either side of it are resonance-contributing structures

Question 3

What is a theory that many molecules and ions are best described as a hybrid of several Lewis structures?

Answer 3

resonance

Question 4

Define resonance

Answer 4

a theory that many molecules and ions are best described as a hybrid of several Lewis structures

Question 5

Describe the preference order for contributing structures

Answer 5

o Preference 1: Filled Valence Shell
o Preference 2: Max number of covalent bonds
o Preference 3: Least separation of unlike charges
o Preference 4: Negative charge on a more electronegative atom

Question 6

Define resonance hybrid

Answer 6

a molecule, ion, or radical described as a composite of a number of contributing structures

Question 7

What are representations of a molecule or ion that differ only in the distribution of valence electrons?

Answer 7

contributing structures (resonance structures or resonance contributors)

Question 8

What is a symbol used to show that structures on either side of it are resonance-contributing structures?

Answer 8

double-headed arrow

Question 9

What is a molecule, ion, or radical described as a composite of a number of contributing structures?

Answer 9

resonance hybrid