1. what is the electron configuration of the gallium ion?

Abbreviated Electronic configuration for gallium ion:

Ga⁺³ = [Ar] 3d¹⁰

Un-abbreviated Electronic configuration of gallium ion:

Ga⁺³ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s⁰ 3d¹⁰ 4p⁰

Explanation:

Gallium is resent in group 13. The most common ion of this group is +3 so gallium gives +3 ion.

The atomic number of gallium is 31.

Abbreviated Electronic configuration of gallium

Ga₃₁ = [Ar] 3d¹⁰ 4s² 4p¹

Abbreviated Electronic configuration for gallium ion:

Ga⁺³ = [Ar] 3d¹⁰

Un-abbreviated Electronic configuration of gallium ion:

Ga⁺³ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s⁰ 3d¹⁰ 4p⁰

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.