b. Draw the resonance forms for ozone (bonded O–O–O)
c. Sulfur dioxide has one more resonance form than ozone. Explain why this structure is not possible for ozone.

Give the relationship between the following pairs of structures. The possible relationships are:

same compound

constitutional isomers (structural isomers)

cis-trans isomers

not isomers (different molecular formula)

(g) CH₃–CH₂–CH₂–CH₃ and CH₃–CH=CH–CH₃

(h) CH₂=CH–CH₂CH₂CH₃ and CH₃–CH=CH–CH₂CH₃

(i) CH₂=CHCH₂CH₂CH₃ and CH₃CH₂CH₂CH=CH₂

a. Draw the resonance forms for SO₂ (bonded O–S–O).

There is a small portion of the periodic table that you must know to do organic chemistry. Construct this part from ­memory, using the following steps.

a. From memory, make a list of the elements in the first two rows of the periodic table, together with their numbers of valence electrons

b. Use this list to construct the first two rows of the periodic table.

c. Organic compounds often contain sulfur, phosphorus, chlorine, bromine, and iodine. Add these elements to your ­periodic table.

Name the element that corresponds to each electronic configuration.

a. 1s² 2s² 2p²

b. 1s² 2s² 2p⁴

c. 1s² 2s² 2p⁶ 3s² 3p³

d. 1s² 2s² 2p⁶ 3s² 3p⁵

For each compound, state whether its bonding is covalent, ionic, or a mixture of covalent and ionic.

a. NaCl

b. NaOH

c. CH₃Li

d. CH₂Cl₂

e. NaOCH₃

f. HCO₂Na

g. CF₄

Give the relationship between the following pairs of structures. The possible relationships are:

same compound

constitutional isomers (structural isomers)

cis-trans isomers

not isomers (different molecular formula)

(j)

(k)