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An electron described by quantum numbers n= 5, l= 2, m=0 occupies the orbital


1. 5p
2. 5d
3. 5f
4. 5s

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Correct Answer - Option 2 : 5d

The correct answer is 5d.

CONCEPT:

  • Atomic orbitals are the regions where there is a maximum probability of finding electrons.
  • An atom can have a large number of atomic orbitals.
  • Atomic orbitals are distinguished using quantum numbers-  principal quantum number(n), azimuthal quantum number(l), magnetic quantum number(ml) and spin quantum number(ms)
  • Principal quantum number (n) determines the size of the atomic orbital.
  • It is a positive integer with values n= 1,2,3,….
  • It also identifies the shell.
  • Azimuthal quantum number(l) is also known as orbital angular momentum quantum number.
  • It defines the 3-dimensional shape of an orbital.
  • Magnetic quantum number(ml): It gives information about the spatial orientation of the orbital with respect to a standard set of coordinate axis.
  • The value ranges from –l to +l
  • Spin quantum number(ms) refers to the orientation of spin of the electron.
  • Values - +1/2 or -1/2.

EXPLANATION:

  • The given values are principal quantum number, n= 5 ,Azimuthal quantum number, l= 2 and magnetic quantum number ml= 0
  •  n= 5 represents 5th shell and possible l values are 0 to n -1 i.e, 0 to 4 .
  • Given that l = 2, so the electron occupies in d subshell.
  • Therefore the given electron occupies in 5d subshell.

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