Write equations depicting the 1 st , 2 nd , and 3 rd ionization energy of magnesium. How would the 3 rd ionization e nergy compare to the other two?
Mg -------------> Mg+ + e- 1st ionization energy
Mg+ -------------> Mg2+ + e- 2nd ionization energy
Mg2+ -------------> Mg3+ + e- 3rd ionization energy
3rd IE > 1st and 2nd
Because, Mg2+ has electronic configuration of noble gas i.e 1s2 2s2 2p6.
Hence,
more energy is required to remove an electron from Mg2+.
Therefore,
3 rd ionization energy is greater than 1st and 2nd.
Get Answers For Free
Most questions answered within 1 hours.