AP Chemistry - Unit 2 Review

Front

What is the formal charge on the central atom of the nitrate ion (NO3^-)?

Back

-1

Front

Which molecule is nonpolar: CH3F, CF4, or HF?

Back

CF4

Front

What type of alloy is bronze?

Back

Substitutional

Front

Which molecule does not have resonance structures: H2O, O3, HCN, or SO3?

Back

H2O

Front

How many pi bonds are in capsaicin?

Back

5

Front

Define formal charge in the context of molecular structure.

Back

Formal charge is the charge assigned to an atom in a molecule, calculated by the difference between the number of valence electrons and the number of electrons assigned to that atom in the Lewis structure.

Front

What is a resonance structure?

Back

A resonance structure is one of two or more valid Lewis structures for a molecule that cannot be represented accurately by a single Lewis structure.

Front

Explain the difference between polar and nonpolar molecules.

Back

Polar molecules have a net dipole moment due to the presence of polar bonds, while nonpolar molecules do not have a net dipole moment and have an even distribution of charge.

Front

What is the significance of pi bonds in organic molecules?

Back

Pi bonds are important for the reactivity and stability of organic molecules, allowing for the formation of double and triple bonds.

Front

What is the definition of an alloy?

Back

An alloy is a mixture of two or more elements, where at least one is a metal, designed to enhance certain properties.