Electronic Structures of Atoms and Ions

On this page you can practice constructing electronic structures of atoms and ions. When you press "New Problem", an atom or ion will appear in the left side of the page. Place the electrons in the appropriate orbitals in the left side of the page, following the rules for electronic structures. To indicate the degree of occupancy of a given orbital, do the following:
1s 2s2p 3s3p 4s 3d 4p

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