The list of possible set of four quantum numbers for the highest energy electron in gallium is 4, 1, -1, 1/2.
There are four sets of quantum numbers that describe the position of an electron in an atom. These are;
- Principal quantum number (n)
- Orbital quantum number (l)
- Magnetic quantum number (ml)
- Spin quantum number (ms)
The electron configuration of gallium is; Ar 3d10 4s2 4p1. The highest energy electron in gallium is in the 4p orbital. The list of a possible set of four quantum numbers (n,l,ml,ms) in order for this electron is;
- n = 4
- l = 1
- ml = -1
- ms = 1/2
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