​PRINCIPAL QUANTUM NUMBERS (n)

​- identifies the main energy level in which the electrons belong.

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​- the value of n is a positive integer: 1,2,3

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​- therefore, the first main energy level the n value is 1 and so on.

​THE AZIMUTHAL QUANTUM NUMBER , (l)

​- It gives the measure of the momentum of an electron in its motion around the nucleus.

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​- it can also indicate the main energy level is made up of sublevels (subshells)

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​- l value is determined by the value on n it may have a value of 0 t (n-1)

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​-Example : for n=1, the l=0 for n=2, the l = 0,1

​THE MAGNETIC QUANTUM NUMBER , (m)

​- Describes the behavior of an electron in a magnetic field with assigned values of 0, +1 an d-1

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​-Example: for s sublevel where l= 0, m=0

​ for p sublevel where l=1, m= +1, 0, -1

​ for d sublevel where l=2 , m= +2,+1,0,-1.-2

​ for f sublevel where l= 3, m= +3,+2,+1, 0, -1, -2,-3

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​THE SPIN QUANTUM NUMBER

​-Descibe the spin of the electron about its axis.

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​- the value (+ 1/2) if the electron moves clockwise direction and (-1/2) if in counterclockwise direction.

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​According the Pauli's Exclusion Principle states that no oitwo electrons can have the same set of quantum numbers.

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