The provided diagrams illustrate different orbitals:
a) The first diagram depicts an s orbital, characterized by its spherical and symmetrical shape centered on the nucleus. Specifically, it represents the 1s orbital, the closest orbital to the nucleus, located in the n=1 shell.
b) The second diagram showcases a p orbital with a distinctive d**bbell shape. This type of orbital is present in the n=2 shell and beyond. The specific p orbital in the diagram may be either px or py, as they share similar shapes.
c) The third diagram displays a d orbital, found in the n=3 shell and above. The specific d orbital in the diagram could be dxy, dyz, or dxz, as they share similar shapes.