Chapter 2

Explain the difference between the Bohr model for the hydrogen atom and the quantum mechanical model. Is the Bohr model consistent with Heisenberg"s uncertainty principle?

Determine whether an interference pattern is observed on the other side of the slits in each experiment. a. An electro n beam is aimed at two closely spaced slits. The beam is attenuated (made dimmer) to produce only 1 electron per minute. b. An electron beam is aimed at two closely spaced slits. A light beam is placed at each slit to determine when an electron goes through the slit. c. A high-intensity light beam is aimed at two closely spaced slits. d. A gun is fired at a solid wall containing two closely spaced slits. (Will the bullets that pass through the slits form an interference pattern on the other side of the solid wall?)

What are all the possible values of ml if l = 0 (an s orbital)? If l = 1 (a p orbital)? If l = 2 (a d orbital)? How many possible values of ml would there be if l = 20? Write an equation to determine the number of possible values of ml from the value of l.

How many nodes are there in the 1s, 2p, and 3d orbitals? How many nodes are in a 4f orbital?