Carbon exists in different elemental forms in nature, including diamond and graphite. These two forms of carbon are examples of                                .

What is the oxidation number of each oxygen atom in the compound, potassium peroxide?

What is the formal charge on the singly-bonded oxygen atom in the resonance structure of H2SO4 below?

What is the chemical formula for the peroxide anion?

What is the hybridization of the carbon atom notated with an arrow in the Morphine molecule shown below?

What is the EDG and MG of the molecule represented by the ball and stick model below?

Which of the following compounds has an expanded octet around the central atom when the best Lewis Structure is drawn for it?

Which of the following types of bonds is characterized by a small or zero difference in electronegativity between atoms?

The structure of Sarin (an extremely potent nerve agent) is shown here.  In this structure, how many equivalent, delocalized pi (π) bonds are there? (Note that lone pairs have been omitted to save ink)

Which equation below represents the electron affinity of atomic chlorine?