Solutions/Answers to Exercises

Exercise 1. Write electron configurations for the following ions.

Exercise 2. Write an electron configuration for the following ions:

Exercise 3. Write an electron configuration for an ion formed from Se.
This would be Se^2- and the electron configuration is [Kr]

Exercise 4. Write electron configurations for Cu, Cu⁺, Cu^2-.

Cu: [Ar]4s¹3d¹⁰
Cu⁺¹: [Ar]3d¹⁰
Cu²⁺: [Ar]3d⁹

Exercise 5. Which +2 ion has the electron configuration 1s²2s²2p⁶?

Mg²⁺

Exercise 6. An ion has a +2 charge and an electron configuration [Ar]3d¹⁰. What is the identity of the ion?
Zn²⁺

Back to Electron Configurations of Ions