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Scandium has 1 3d electron.
The element with one 3d electron is manganese (Mn), which has the electron configuration [Ar] 3d^5 4s^2.
The electron configuration for scandium is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^1. Therefore, the three highest-energy electrons in scandium are in the 3d orbital, and the electron notation for these three electrons is 3d^1.
Potassium (K) is atomic number 19. It has 19 electrons.1s2 2s2 2p6 3s2 3p6 4s1 so it has ZERO 3d electrons. The 3d doesn't receive electrons until you reach scandium (atomic number 21).
Electronic configuration of scandium: [Ar]3d1.4s2
Scandium has 1 3d electron.
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The element with one 3d electron is manganese (Mn), which has the electron configuration [Ar] 3d^5 4s^2.
The electron configuration for scandium is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^1. Therefore, the three highest-energy electrons in scandium are in the 3d orbital, and the electron notation for these three electrons is 3d^1.
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Scandium (Sc) has an atomic number of 21, which means it has 21 electrons. Its electron configuration is [Ar] 3d¹ 4s². In this configuration, there is one unpaired electron in the 3d subshell, as the 4s subshell is fully paired. Therefore, scandium has one unpaired electron.
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The best way to make a 3D model of an ear is to design each part and then put them together. You can build each part out of paper mache for example.
Potassium (K) is atomic number 19. It has 19 electrons.1s2 2s2 2p6 3s2 3p6 4s1 so it has ZERO 3d electrons. The 3d doesn't receive electrons until you reach scandium (atomic number 21).
Electronic configuration of scandium: [Ar]3d1.4s2
Scandium has four electronic shells with 2, 8, 9, 2 electrons.
In the elements from scandium (Sc, atomic number 21) to zinc (Zn, atomic number 30), the d subshell is being filled by electrons. Specifically, these elements are part of the transition metals, where the 3d subshell is progressively filled. As you move from scandium to zinc, the number of electrons in the 3d subshell increases from 1 in scandium to 10 in zinc.