By listing the electron configuration of the following elements, which of these elements has a completely filled 3d sublevel?
Question
By listing the electron configuration of the following elements, which of these elements has a completely filled 3d sublevel?
Solution
The electron configuration of an element can be used to determine if it has a completely filled 3d sublevel. The 3d sublevel is filled with 10 electrons.
Let's take a look at the electron configurations of some elements:
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Scandium (Sc, atomic number 21): [Ar] 4s2 3d1. The 3d sublevel is not completely filled.
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Iron (Fe, atomic number 26): [Ar] 4s2 3d6. The 3d sublevel is not completely filled.
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Zinc (Zn, atomic number 30): [Ar] 4s2 3d10. The 3d sublevel is completely filled.
So, among these elements, Zinc (Zn) has a completely filled 3d sublevel.
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