write the important of principal quantum number in the structure of atom.
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It tells the principal energy level or shell to which the electron belongs. It is donated by the letter n and can have any integral value except 0 ie. n=1,2,3,4…. etc. The variousprincipal energy shells are also designated by the letters K,L,M,N,O……starting from the nucleus
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A total of four quantum numbers are used to describe completely the movement and trajectories of each electron within an atom. The combination of all quantum numbers of all electrons in an atom is described by a wave function that complies with the Schrödinger equation.
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