Write a possible full set of quantum numbers for the electron gained when a bromine atom (br) becomes a bromide ion (br-).

Quantum numbers are a set of numbers used to describe the position and the motion of an electron within the atom.

Quantum numbers are as follows:

n-quantum number : represents the energy level

l-quantum number : represents the orbital (s, p, d, f, ...)

ml-quantum number : represents the position of the electron within the orbital

ms-quantum number : represents the spin of the electron within the electron pair.

Bromine has an atomic number of 35.

So, the configuration of the Br is: [Ar] 3d10 4s2 4p5

Now, we will add one electron to the Br to be a negative ion (Br-).

This extra electron will be added to the 4th principle level in the p-orbital.

So, the quantum numbers that represent the extra electron added to the Br will be as follows:

n = 4 (it is added in the 4th principle level)

l = 1 (it is added in the p-orbital)

ml = 1

ms = - 1/2