Use collision theory to explain why reaction rates generally increase when the concentration of one or more of the reactants increases.

Lamarck's ideas of evolution are known as the inheritance of acquired characteristics: What was incorrect about his theory of how organisms evolve?

Explain in terms of valence bond theory why the orbitals used on an atom give rise to a particular geometry about that atom.

Using the VSEPR theory, predict the molecular structure of the following molecules or ions containing multiple bonds.

b. $\mathrm{SO}_3$

A hydrogen atom is in its first excited state $(n=2)$. Using the Bohr theory of the atom, calculate (e) the potential energy

Using the VSEPR theory, predict the molecular structure of the following polyatomic ions.

c. ammonium ion, $\mathrm{NH}_4{ }^{+}$

What purpose did Herbert Spencer have in interpreting Charles Darwin's theory of natural selection as "survival of the fittest"?

Describe some of the ways in which Anna Freud, Heinz Kohut, and Melanie Klein extended and modified traditional Freudian theory.

Apply VSEPR theory to explain why CF$_{4}$ is a nonpolar molecule even though it has four polar bonds.

State two principles from Dalton’s atomic theory that have been revised as new information has become available.

Newton's particle theory of light is unable to account for which phenomenon? (a) propagation (b) reflection (c) radiation pressure (d) diffraction

According to the Eysencks’ theory, people who score high on neuroticism tend to be ________.
a. calm
b. stable
c. outgoing
d. anxious

On a separate sheet of paper, answer the questions below. Make sure, you read carefully and answer all parts of the questions. Some U.S. policymakers believed in the domino theory—if the Communists conquered South Vietnam, then other countries in that region would eventually be conquered as well. Did the theory turn out to be valid? Explain.

A hydrogen atom is in its first excited state (n = 2). Using the Bohr theory of the atom, calculate the potential energy.