Summary

• Particles & waves
• Wave function Ψ
• Heisenberg uncertainty principle

• Class Quiz
  
  
  
• The QM atom
  • Schr�dinger equation
  • energy levels
  • four quantum numbers
  • The Pauli exclusion principle
  • electron wave functions applet
  • H orbitals
    Example #1
    
  
  
  
• The periodic table
  Example #2
  
  
  
• Lasers
  • spontaneous emission
  • stimulated emission applet
  • laser operation
          Light
          Amplification by
          Stimulated
          Emission of
          Radiation
    

gc6 28.8
A free neutron (m = 939.6 MeV/c²) has a mean life of 900 s. What is the uncertainty in its mass?
A. 1.17×10^-37 eV/c²            B. 7.32×10^-19 eV/c²
C. 8.55 µeV/c²                    D. 1.06 neV/c²
Answer







klm
How many different states are possible for an electron whose principal quantum number is n = 4? A. 8            B. 18            C. 32            D. 50
Answer







sj6 42.38
What is the probable electronic configuration of a neutral atom of element 110?
A. [Rn] 5f ¹⁴ 6d ² 6f ⁶
B. [Rn] 5f ¹⁴ 6d ⁰ 6f ⁸
C. [Rn] 5f ¹⁴ 6d ⁸ 7s²
D. [Rn] 5f ¹⁶ 6d ⁶ 7s²
Answer







 



B. 7.32×10^-19 eV/c²













 



C. 32













 



C. [Rn] 5f ¹⁴ 6d ⁸ 7s²
Use the diagrams above to determine that the 7s subshell will fill up before the 5f or 6d subshells. Along the block of elements from 104 to 112 the 6d subshell is being filled. There is in reality an anomaly here and the actual observed configuration is 5f ¹⁴ 6d ⁹ 7s¹.