A) 2n
B) \[{{\operatorname{n}}^{2}}\]
C) \[2{{n}^{2}}\]
D) n+1
Correct Answer: B
Solution :
Principal quantum number (n) : It tells about the principal energy level or shell to which electron belongs. It gives average distance of the electron and determines the energy of electron. No. of orbitals in nth shell = n No. of orbitals in nth shell =\[{{\operatorname{n}}^{2}}\] Maximum no. of electrons in nth shell = 2\[{{\operatorname{n}}^{2}}\] \[\therefore ~Total no. of orbitals ={{n}^{2}}\]
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