Answer
a. 1s and 2s orbitals have the same shape and the maximum number of electrons.
b. 3s and 3p sublevels are at the same energy level.
c. 3p and 4p sublevels have the same shape and the maximum number of electrons.
d. all three 3p orbitals have the same shape, the maximum number of electrons and are at the same energy level.
Work Step by Step
You can find the answers to this question on topic 4.6 'Electrons Energy Levels' pages 121 to 126.