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NEET2012ChemistryStructure of AtomActual

Which one of the following sets of quantum numbers represents the highest energy level in an atom?

Options

  1. An=4, l=0, m=0, s=+ 1 2
  2. Bn=3, l=1, m=1, s=+ 1 2
  3. Cn=3, l=2, m=-2, s=+ 1 2
  4. Dn=3, l=0, m=0, s=+ 1 2

Correct answer

C. n=3, l=2, m=-2, s=+ 1 2

Step-by-step solution

According to ((n+l) ) rule, the energy of an orbital depends upon the sum of the values of the principal quantum number ( (n )) and the azimuthal quantum number ( (l )). Lower the value of ((n+l) ), lower is the energy. If two different orbitals have the same value of ((n+l) ), the orbital with lower value of (n ) has lower energy.

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