Chapter 5: Electrons in Atoms

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Chapter 5 Electrons in Atoms

• Review for Exam

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Quiz

• You have 5 minutes to respond the items on the
  quiz.
• Any questions?

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Exceptions to aufbau process

• The only reason that there are exceptions to the
  aufbau process (building up) is that some
  configurations have higher stability than others.
• Stability Ranking
• Filled sub-levels (s, p, d, f)
• Half-filled sub-levels
• All others

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Exceptions to aufbau process

• Predicted by aufbau
• Cr 1s22s22p63s23p64s23d4
• Cu 1s22s22p63s23p64s23d9
• Observed
• Cr 1s22s22p63s23p64s13d5
• Cu 1s22s22p63s23p64s13d10

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Putting it together

• Principal QN
• Distance from nucleus
• Main energy level
• Periods on PT (Rows)
• n
• The number in front of the letter
• Orbital QN
• Shape of region of probability
• Energy sub-level
• Blocks on PT
• l n-1
• The letters (s, p, d, f)

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Putting it together

• Magnetic QN
• Orientation in 3-D space
• columns in blocks on PT
• m l - l through zero to l
• The number of dashes
• Spin QN
• Spin of e-
• Half the block
• ms 1/2 or -1/2
• The half arrows

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Dont Forget

• Today
• Game Project
• Tuesday
• Test
• CM (if you want to have it during the exam)
• Wednesday
• Test
• SR, VR, CHIG, Practice Problems
• Essay
• CM (if you did not use it during test)
• Proof Reflection Ticket

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Dont Forget

• You will NOT be allowed to use the Quantum
  Numbers Table during the examyou must learn to
  use a regular periodic table to assign quantum
  numbers and build-up configurations.

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The rest of class is your time to review for the
exam or work on the concept map.