Here is a sketch of a 3d,, orbital: This sketch is about 1800 pm wide. The coordinate (x, y, and z) axes are also shown. You can rotate the sketch for a better view of the orbital by dragging the slider with your mouse. Suppose an atom with its nucleus at the origin has an electron in a 3d,, orbital. Complete each row of the table below by deciding how P, the probability of finding the electron at point A, compares to P the probability of finding the electron at point B. B' point A point B compare PA to PB O P A B 200 pm behind the nucleus, along the +y axis. 200 pm above the nucleus, along the +z axis. P = P A B A < P B 200 pm in front of the nucleus, along the -y axis. 200 pm to the right of the nucleus, along the +x axis. B A > P B P 200 pm to the left of the nucleus, along the -x axis. 200 pm below the nucleus along the -z axis. P > P B

Suppose that the spin quantum number could have the values 12,0 and 12 . Assuming that the rules governing the values of the other quantum numbers and the order of filling sublevels were unchanged, (a) what would be the electron capacity of an s sublevel? a p sublevel? a d sublevel? (b) how many electrons could fit in the n=3 level? (c) what would be the electron configuration of the element with atomic number 8? 17?

Defend and criticize Bohrs model. Why was it reasonable that such a model was proposed, and what evidence was there that it "works"? Why do we no longer "believe" in it?

How does probability fit into the description of the atom?