Question
  1. Define Aufbau's principle.
  2. Draw the shape of $\text{d}_{\text{z}^2}$ orbital.
  3. Which quantum number specify number of orbitals in a given subshell?

Answer

  1. Aufbau's principle: Electrons are filled in the orbitals in increasing order of energies in grand state.
  2.  
  1. Number of orbitals in gives subshell is decided by magnetic quantum number.

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