Question

The Azimuthal quantum number for the valence electrons of Ga⁺ ion is ______. (Atomic number of Ga = 31)

Options

• 8

• 0

• 6

• 2

Answer 1

The Azimuthal quantum number for the valence electrons of Ga⁺ ion is 0.

Explanation:

The atomic number of gallium, a metal, is 31. Ga has the following electronic configuration:

Ga (31) : [Ar]3d¹⁰ 4s² 4p¹

Ga⁺ ions will have one fewer electron. Ga⁺ valence shell will therefore be 4s.

Ga⁺ : 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²

The azimuthal quantum number is denoted by l and is also known as angular momentum quantum number. It explains the shape of given orbital.

The s orbital will have I = 0 value as s orbital does not have orbital angular momentum to fill the electron away from the nucleus.

The Azimuthal quantum number for the valence electrons of Ga⁺ ion is 0.