Which of the following atoms or ions has 3 unpaired electrons? A) Br^- B) Ga C) S D) Co E) Mg²⁺

Name: Which of the following atoms or ions has 3 unpaired electrons? A) Br - B) Ga C) S D) Co E) Mg 2+
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Question

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The atom or ion with 3 unpaired electrons is Co (cobalt). Cobalt has an electron configuration of [Ar] 3d7 4s2, indicating that it has seven valence electrons in its 3d subshell. Three of these electrons are unpaired, making Co the only choice with three unpaired electrons.

Which of the Following Atoms or Ions Has 3 Unpaired