Which of the following sets of numbers could be used to designate the principal energy levels (shells) in an atom?
a. –1, 0, 1, 2, 3
b. 0, 1, 2, 3, 4
c. 1, 2, 3, 4, 5
d. all of these
a. –1, 0, 1, 2, 3
b. 0, 1, 2, 3, 4
c. 1, 2, 3, 4, 5
d. all of these