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How many electrons can fill a d subshell?
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periodic table
Modern version of the periodic table of the elements. To learn an element's name, atomic number, electron configuration, atomic weight, and more, select one from the table.
A d subshell can hold a maximum of 10 electrons.1
This capacity is determined by the number of orbitals within the subshell. According to the principles of quantum mechanics, there are five distinct d orbitals for a given principal energy level. Because the Pauli exclusion principle dictates that each individual orbital can accommodate a maximum of two electrons with opposing spins, the five d orbitals collectively hold up to 10 electrons.12