Isoelectronic Species

Isoelectronic Species

For each of the following ions:

Tell which noble gas it is isoelectronic with 

          Provide names

          Provide electron configurations and orbital diagrams

          a. Br^-

          b. Mg²⁺

          c. N^3-

          d. Ba²⁺

          e. P^3-

          f. Li⁺

          g. O^2-

          h. K⁺

          i. Sr²⁺

          j. S^2-

Answers are below. (Orbital notations are coming)

      a. Br^- is isoelectronic with krypton.

          Bromide

          1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 

         

      b. Mg²⁺ is isoelectronic with neon.

          Magnesium ion

          1s² 2s² 2p⁶

      c. N^3- is isoelectronic with neon.

          Nitride

1s² 2s² 2p⁶

      d. Ba²⁺ is isoelectronic with krypton.

          Barium ion

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 

      e. P^3- is isoelectronic with argon.

          Phosphide

1s² 2s² 2p⁶ 3s² 3p⁶

      f. Li+ is isoelectronic with helium.

          Lithium ion

1s²

      g. O^2- is isoelectronic with neon.

          Oxide

1s² 2s² 2p⁶

      h. K⁺ is isoelectronic with argon.

          Potassium ion

1s² 2s² 2p⁶ 3s² 3p⁶

      i. Sr²⁺ is isoelectronic with krypton.

          Strontium ion

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 

      j. S^2- is isoelectronic with argon.

          Sulfide

1s² 2s² 2p⁶ 3s² 3p⁶