What is the electron configuration of the gallium ion?

2 Answers
Jun 8, 2016

Answer:

The electron configuration for Gallium, Ga is
#1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^1#

Explanation:

Gallium, Ga has 31 protons and 31 electrons. The superscripts represent the electrons present in each region of the periodic table.
The sum of these superscripts should equal the atomic number for a neutral atom. The last electron is in the 4th period, in the p region and the first electron in that region.

Jul 5, 2016

Answer:

The most common electron configuration for the gallium ion, #"Ga"^(3+)# is
#1s^2 2s^2 2p^6 3s^2 3p^6 3d^10# or #["Ar"] 3d^10#.

Explanation:

Gallium is in Group 13. It has 31 electrons.

Its electron configuration is #1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p#

We form cations by removing electrons first from the outermost #p# orbitals, followed by the #s# orbital and finally the #d# orbitals (if any more electrons need to be removed).

The options for #"Ga"# would be to remove

  • the #4p# electron and form #"Ga"^+#
  • the #4p# electron and both #4s# electrons and form #"Ga"^(3+)#.

By far the most common ion of Group 13 metals is +3.

So. the most common gallium ion is #"Ga"^(3+)#, and its electron configuration is #["Ar"] 3d^10#.