A) How many electrons may be described by the following quantum number sets:

a. n=1, 1=0

b. n=2, 1=0

c. n=4, 1=2, mi=0

d. n=5, 1=3

B) Identify an element whose highest energy electron may have the quantum numbers:

. 3, 1, -1, + 1/2

b. 4, 2, +1, +1/2

c. 6, 1, 0, -1/2

d. 2, 0, 0, -1/2

C) Based on quantum number rules, are the following sets allowable? If not, explain why not

. 2, 2. +1, -1/2

b. 5, 1, 0, +1/2

c. 6, 3. -2, + 1/2

d. 7, 0, 0, -1/2

E) if the electron in hydrogen goes from the ground state taken to a position so far from the

nucleus that n = c, calculate the ionization energy (kJ/mol).