Due to the breakdown of periodic trends expected in this region due to the closeness of energy of the 5g, 6f, 7d and 8p orbitals and other relativistic effects, it seems likely that the properties and placement in the periodic table of these elements may be of only formal significance.

Due to the breakdown of periodic trends expected in this region due to the closeness of energy of the 5g, 6f, 7d and 8p orbitals and other relativistic effects, it seems likely that the properties and placement in the periodic table of these elements may be of only formal significance.

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