Question

Berlyium fourth electron will have the four quantum numbers

Answer 1

Hey,

In the building up process, we go one electron at a time. Therefore, we will use the three from lithium and add one more.

Fourth Electron

n = 2

ℓ = 0

mℓ = 0

ms = -½

Notice the same n, ℓ, and m values as the third electron, but ms for the fourth electron has shifted from positive ½ to negative ½.

~Azzy

Answer 2

Answer:

Z = 5; (Boron): The first four electrons have the same four quantum numbers as Berylium, but the fifth electron is the first one in the l = 1 subshell which can have m(l)-values -1, 0 and +1.

Explanation: