Write electron configurations for the following ions in spdf and orbital box notation.
a. O $^{2−}$ (Do not use noble gas notation.)
b. I $^{−}$ (Use noble gas notation.)

Question

Write electron configurations for anions.

Write electron configurations for the following ions in spdf and orbital box notation.
a. O[latex]^{2−}[/latex] (Do not use noble gas notation.)
b. I[latex]^{−}[/latex] (Use noble gas notation.)

Accepted Answer

You are asked to write an electron configuration for an anion using spdf and orbital box notation.
You are given the identity of the anion.
a. Oxygen is element 8. The element gains two electrons in its highest-energy orbitals to form the O[latex]^{2−}[/latex] ion.

[latex]\text{O :} 1s^{2}2s^{2}2p^{4} \underset{1S}{\boxed{\[0.5cm] \uparrow \downarrow \enspace }} \,\,\underset{2S}{\boxed{\[0.5cm] \uparrow \downarrow \enspace }}\,\,\, {\boxed{\[0.5cm] \uparrow \downarrow \enspace }}\underset{2P}{\boxed{\[0.5cm] \uparrow \enspace }}{\boxed{\[0.5cm] \uparrow \enspace }}[/latex]

[latex]\text{O}^{2-}:1s^{2}2s^{2}2p^{6} \underset{1S}{\boxed{\[0.5cm] \uparrow \downarrow \enspace }} \,\,\underset{2S}{\boxed{\[0.5cm] \uparrow \downarrow \enspace }}\,\,\, {\boxed{\[0.5cm] \uparrow \downarrow \enspace }}\underset{2P}{\boxed{\[0.5cm] \uparrow \downarrow \enspace }}{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}[/latex]

b. Iodine is element 53. The element gains one electron in its highest-energy orbital to form the I[latex]^{−}[/latex] ion.

[latex]\text{ I}: \left[Kr\right] 5s^{2}4d^{10}5P^{5}\left[Kr\right] \underset{5s}{{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}} \,\,\,{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}\underset{4d}{{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}} {\boxed{\[0.5cm] \uparrow\downarrow \enspace }}{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}\,\,\,{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}\underset{5p}{{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}} {\boxed{\[0.5cm] \uparrow \enspace }}[/latex]

[latex]\text{ I}^{-}: \left[Kr\right] 5s^{2}4d^{10}5P^{6}\left[Kr\right] \underset{5s}{{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}} \,\,\,{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}\underset{4d}{{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}} {\boxed{\[0.5cm] \uparrow\downarrow \enspace }}{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}\,\,\,{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}\underset{5p}{{\boxed{\[0.5cm] \uparrow\downarrow \enspace }}} {\boxed{\[0.5cm] \uparrow\downarrow \enspace }}[/latex]

Question 7.5.2: Write electron configurations for the following ions in spdf......

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