Shell,Name,Description
"s-shell","s-block","The s-block consists of elements in Groups 1 and 2 plus Helium. The valence electrons of these elements are in the s-shell. This spherical shaped shell holds at most 2 electrons, and has an azimuthal quantum number of 0. The ""s"" stands for ""sharp""."
"p-shell","p-block","The p-block consists elements in Groups 13 to 18 but not Helium. The valence electrons of these elements are in the p-shell. This dumb-bell shaped shell holds at most 6 electrons, and has an azimuthal quantum number of 1. The ""p"" stands for ""principal""."
"d-shell","d-block","The d-block consists of elements in Groups 3 to 12. The valence electrons of these elements are in the d-shell. This shell holds at most 10 electrons, and has an azimuthal quantum number of 2. The ""d"" stands for ""diffuse""."
"f-shell","f-block","The f-block consists of elements in the Lanthanides and Actinides families. The valence electrons of these elements are in the f-shell. This shell holds at most 14 electrons, and has an azimuthal quantum number of 3. The ""f"" stands for ""fundamental""."