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Quantum Numbers | Types | Significance

Quantum Numbers | Types | Significance

Quantum Numbers | Types | Significance

“The numbers which represent the position and energy of electrons in an atom are called Quantum numbers.”

According to the modern concept, the following four quantum numbers are required to represent the position and energy of an electron in an atom completely –

(1) Principal quantum number (n)

(2) Azimuthal quantum number (l)

(3) Magnetic quantum number (m)

(4) Spin quantum number (s)

(1) Principal quantum number (n)

This quantum number represents the Principal energy level or shell of the electron. It is denoted by “n” and it can have any integral value except zero. Thus,

Permitted values of n = 1, 2, 3, 4,—–( any integral value except zero)

Depending upon the value of n being 1, 2, 3, 4,—— etc. the shells are designated as K, L, M, N,—–shells respectively.

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