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32 ChemActivity 3: Electron Orbitals 4. Consider the incomplete orbital representation of O$_2$, below right. a. Identify which lobes are hybrid orbitals (identify the type) and which lobes are p orbitals. b. Use dotted lines to show any $\pi$ bonds. c. Use up or down arrows to show electron occupation of each hybrid orbital or bond. A double bond consists of one $\sigma$ overlap and one $\pi$ overlap. $\sigma$ bond (or vice versa) $\pi$ bond (or vice versa) Lewis Drawing of O$_2$ Orbital Drawing of O$_2$ 5. Consider the following orbital representation of HCCH (ethyne). Orbital Drawing of H-C$\equiv$C-H a. Answer the same three questions (a-c) from the previous exercise. b. Label each C-H $\sigma$ bond in the drawing above. c. What is the total number of $\sigma$ bonds found in ethyne? ... $\pi$ bonds? d. How many p orbitals are there on a single carbon of ethyne? e. How many hybrid orbitals are there on a single carbon of ethyne?

          32 ChemActivity 3: Electron Orbitals
4. Consider the incomplete orbital representation of O$_2$, below right.
a. Identify which lobes are hybrid orbitals (identify the type) and which lobes are p orbitals.
b. Use dotted lines to show any $\pi$ bonds.
c. Use up or down arrows to show electron occupation of each hybrid orbital or bond.
A double bond consists of one
$\sigma$ overlap and one $\pi$ overlap.
$\sigma$ bond (or vice versa)
$\pi$ bond (or vice versa)
Lewis Drawing of O$_2$
Orbital Drawing of O$_2$
5. Consider the following orbital representation of HCCH (ethyne).
Orbital Drawing of
H-C$\equiv$C-H
a. Answer the same three questions (a-c) from the previous exercise.
b. Label each C-H $\sigma$ bond in the drawing above.
c. What is the total number of $\sigma$ bonds found in ethyne? ... $\pi$ bonds?
d. How many p orbitals are there on a single carbon of ethyne?
e. How many hybrid orbitals are there on a single carbon of ethyne?

32 ChemActivity 3: Electron Orbitals
4. Consider the incomplete orbital representation of O2, below right.
a. Identify which lobes are hybrid orbitals (identify the type) and which lobes are p orbitals.
b. Use dotted lines to show any π bonds.
c. Use up or down arrows to show electron occupation of each hybrid orbital or bond.
A double bond consists of one
σ overlap and one π overlap.
σ bond (or vice versa)
π bond (or vice versa)
Lewis Drawing of O2
Orbital Drawing of O2
5. Consider the following orbital representation of HCCH (ethyne).
Orbital Drawing of
H-C≡C-H
a. Answer the same three questions (a-c) from the previous exercise.
b. Label each C-H σ bond in the drawing above.
c. What is the total number of σ bonds found in ethyne? ... π bonds?
d. How many p orbitals are there on a single carbon of ethyne?
e. How many hybrid orbitals are there on a single carbon of ethyne?

Added by David W.

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