Write out the outer electron configurations for the following ions: a) Ga³⁺, b) Mn²⁺.

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2. Write out the outer electron configurations for the following ions.

• a) Ga³⁺ (Assuming G is Gallium, Ga)

  • Neutral Ga: $[\text{Ar}] 3\text{d}^{10} 4\text{s}^2 4\text{p}^1$
  • To form Ga³⁺, three electrons are removed: two from $4\text{s}$ and one from $4\text{p}$.
  • Outer electron configuration: $\boxed{[\text{Ar}] 3\text{d}^{10}}$

• b) Mn²⁺ *