The atomic orbital sets of similar energy are grouped into a series of seven shells, which is equal to the number of periods in the periodic table. Complete the energy-level diagram by filling the number of electrons in each orbital set within a shell, and also give the total number of electrons in each shell. The first shell has been filled in for you as an example.

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3 4 8 10 14 8 18 32 Seventh-row capacity: Sixth-row capacity: Fifth-row capacity: Fourth-row capacity: Third-row capacity: Second-row capacity: First-row capacity: 7p 7s 6s 5s 5p 4s 3s 2s 1s 5d 4p 3p 6d 2p 4d 3d 5f 4f 7th Shell 6th Shell 5th Shell 4th Shell 3rd Shell 2nd Shell 2 1st Shell