What is the ground-state electron configuration for the element chromium (Z = 24)? A)[Ne] 4s²3d⁴ B)[Ar] 4s²3d⁴ C)[Ar] 4s¹3d⁵ D)[Ar] 3d⁶

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Chromium has a total of 24 electrons. The electron configuration of the element Chromium can be determined by using the Aufbau principle and Hund's rule. The Aufbau principle states that electrons occupy the lowest energy level first, while Hund's rule states that each orbital in a subshell must be occupied by one electron before a second electron is added to any orbital. The electron configuration for Chromium would be [Ar] 4s1 3d5. However, Chromium is an exception to this, and one of the electrons from the 4s orbital jumps up to the 3d orbital, creating a half-filled d subshell, which is more stable. Thus, the ground-state electron configuration of Chromium is [Ar] 4s1 3d5, which can be represented as [Ar] 4s1U1P11S1P03d1U1P5S1P0 or simplified to [Ar] 4s1U1P11S1P03d5. Choice C is the only option that has the correct configuration for Chromium.

What Is the Ground-State Electron Configuration for the Element Chromium