Final answer:
Chromium can form a Cr³+ ion, with two electrons being lost from the 4s orbital and one from the 3d orbital, resulting in a [Ar] 3d³ configuration for the Cr³+ ion.
Step-by-step explanation:
The subject of this question is Chemistry, and it pertains to the electron configurations of transition metals and the formation of ions. When considering the electron configuration of Chromium (Cr), which is anomalously [Ar] 4s¹3d⁵, the student is inquiring whether Chromium can form an ion with a +3 charge.
In response to this, we can confirm that Chromium can indeed form a Cr³+ ion. Upon formation of this ion, Chromium loses two electrons from the 4s orbital and one electron from the 3d orbital, leading to the electron configuration of [Ar] 3d³ for the Cr³+ ion.
This process involves the removal of electrons from the highest energy orbitals first. For transition metals like Chromium, the s-orbital electrons are removed before the d-orbital electrons when forming cations.