NEET · Chemistry · Quantum Numbers

Exercise and reference answers

Matching pairs

1. Left

   Principal (n)

   Right

   Shell number; energy and size

2. Left

   Azimuthal (l)

   Right

   Sub-shell shape (0=s, 1=p, …)

3. Left

   Magnetic (m_l)

   Right

   Orientation of orbital in space

4. Left

   Spin (m_s)

   Right

   +½ or −½ (electron spin)

5. Left

   Pauli's exclusion

   Right

   No two electrons share all 4

6. Left

   Hund's rule

   Right

   Half-fill before pairing

Instructions

Match each quantum-number concept to its meaning.