# Introductory Chemistry

## Educators

Problem 1

What makes carbon able to form so many different compounds?

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Problem 2

Your roommate, a chemistry major, claims to have synthesized the compound $\mathrm{CH}_{5}$ in the lab. Why is that not possible?

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Problem 3

What does a double bond represent? How many pairs of electrons are shared between the atoms in a double bond? Draw the Lewis structure of a simple molecule that contains a double bond.

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Problem 4

How many electron pairs are shared when a triple bond exists between two carbon atoms? What must
be the geometric arrangement around the carbon atoms in a triple bond? Draw the Lewis structure of
a simple molecule that contains a triple bond.

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Problem 5

When a carbon atom is bonded to four other atoms, what geometric arrangement occurs around the carbon atom? Why?

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Problem 6

Draw the Lewis structures for carbon dioxide and carbon monoxide.

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