Use the periodic table to determine the ground-state electron configuration for the following element: Sc A) [Ar]4s²3d¹ B) [Ar]4s²3d² C) [Ar]4s³ D) [Ar]3d³ E) [Ar]4s²3d³

Question

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The ground-state electron configuration for Sc is [Ar]4s²3d¹. This is because Sc has 21 electrons, and the first 18 electrons fill the 1s, 2s, 2p, 3s, and 3p orbitals. The remaining three electrons fill the 4s and 3d orbitals, with two electrons in the 4s orbital and one electron in the 3d orbital.

Use the Periodic Table to Determine the Ground-State Electron Configuration