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Electronic configuration
 

Electronic configuration

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    Electronic configuration Electronic configuration Presentation Transcript

    • ELECTRONIC CONFIGURATION
    • ELECTRONIC CONFIGURATION
      -arrangement of electrons in the space around the nucleus of an atom.
      -distribution of electrons in the orbitals of an atom.
    • ELECTRONIC CONFIGURATION
      ENERGY LEVEL (electron shell)
      -orbit where electrons spin around the nucleus of an atom.
    • ELECTRONIC CONFIGURATION
    • ELECTRONIC CONFIGURATION
      ENERGY SUBLEVEL (subshell)
      -energy subdivision of a principal energy level.
      -designated by:
      s(sharp)
      p (principal)
      d (diffuse)
      f (fundamental)
    • Mnemonic Device for Electronic Configuration
    • Electronic configuration of:
      IodineI53
      = 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5
    • Electronic configuration of:
      Silicon Si14
      = 1s2 2s2 2p6 3s2 3p2
      LeadPb82
      = 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p2
    • RULES
      AND
      CONCEPTS
    • AUFBAU’S PRINCIPLE
      -”aufbau” –building up
      -principle of electrons filling up the orbitals in order of increasing energy.
    • PAULI’S EXCLUSION PRINCIPLE
      -an orbital may be occupied by a maximum of two (2) electrons.
      -the maximum number of electrons in each of the sublevels and orbitals:
    • HUND’S RULE
      -if electrons have more than one equivalent orbital available, they will half-fill each of the equivalent orbitals before filling the second half of each.
    • Example: Electronic configuration of: 14N = 1s2 2s2 2p37
    • Electronic configuration of:56Fe= 1s22s2 2p6 3s2 3p6 4s2 3d 626