In the electrosphere, electrons revolve around the nucleus, occupying what we call the energy levels or electronic layers. Each level has an integer from 1 to 7 or the capital letters K, L, M, N, O, P, Q.
In layers, electrons move and when they move from one layer to another they absorb or release energy.
When an electron jumps to an innermost layer it releases energy. When an electron jumps to an outer shell it absorbs energy.
The emitted energy is in the form of light. We call this energy “quantum" power. O "quantum”Is also called photon.
Each electronic layer can contain a certain maximum number of electrons. Look at the table:
|LAYER NAME||LEVEL||MAX No. FROM IS IN LAYER|
The number of layers or levels of energy varies according to the number of electrons of each atom.
In every atom (except palladium - Pd) the maximum number of electrons in a K layer only supports 2 electrons. The penultimate layer must have a maximum of 18 electrons.
For atoms with more than 3 layers, while the penultimate is not 18 electrons, the last one will have at most 2 electrons.
Note some distributions:
H (hydrogen) e = 1
K = 1
K (potassium) # is = 19
K = 2 L = 8 M = 8 N = 1
Be (beryllium) # of is = 4
K = 2 L = 2
Zr (zirconium) # is = 40
K = 2 L = 8 M = 18 N = 10 O = 2