devarshi-dt-logo

Question:

The quantum numbers of six electrons are given below. Arrange them in order of increasing energies.

  1. n=4, l=2, m1=-2, ms=-1/2
  2. n=3, l=2, m1=1, ms=+1/2
  3. n=4, l=1, m1=0, ms=+1/2
  4. n=3, l=2, m1=-2, ms=-1/2
  5. n=3, l=1, m1=-1, ms=+1/2
  6. n=4, l=1, m1=0, ms=+1/2

Solution:

  1. The quantum numbers n=4, l=2, m1=-2, ms=-1/2 represents 4d orbital.
  2. The quantum numbers n=3, l=2, m1=1, ms=+1/2 represents 3d orbital.
  3. The quantum numbers n=4, l=1, m1=0, ms=+1/2 represents 4p orbital.
  4. The quantum numbers n=3, l=2, m1=-2, ms=-1/2 represents 3d orbital.
  5. The quantum numbers n=3, l=1, m1=-1, ms=+1/2 represents 3p orbital.
  6. The quantum numbers n=4, l=1, m1=0, ms=+1/2 represents 4p orbital.
    The order of increasing energies is (v) < (ii)=(iv) < (vi)=(iii) < (i).