How to write electron configurations

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A complete guide on how to write the electron configuration of any atom. Find more resources on chemistry at http://periodictablewithnames.net

A complete guide on how to write the electron configuration of any atom. Find more resources on chemistry at http://periodictablewithnames.net

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How to write electron configurations How to write electron configurations Presentation Transcript

  • How to write the electronconfiguration of an atom By José @ Periodic table with nameshttp://periodictablewithnames.net
  • Steps to write the electron configuration of a neutral atom1. Find the atomic number of the atom, this number must be equal to the number of electrons on the atom.The atomic number of an atom is located in the upper left corner on the box for any of the elements in the periodic table.
  • 1. Locate the atomic number
  • 1. Locate the atomic number
  • 1. Locate the atomic number
  • 2. Having the atomic number of the atom, follow the Aufbau principle to assign the corresponding number of electrons to each orbital of the atom.
  • Using the following electron configuration chart we are going to build the configuration for potassium, K0, atomic number: 19.Remember that the maximum number of electrons for each orbital are:2 for s6 for p10 for d14 for f
  • Now we just have to follow the arrows until we sum 19 electrons:
  • Now we just have to1s2 follow the arrows until we sum 19 electrons: 1s2
  • Now we just have to follow the arrows until we sum 192s2 electrons: 1s2 2s2
  • Now we just have to follow the arrows until we sum 192p6 electrons: 1s2 2s2 2p6
  • Now we just have to follow the arrows until we sum 19 electrons:3s2 1s2 2s2 2p6 3s2
  • Now we just have to follow the arrows until we sum 19 electrons:3p6 1s2 2s2 2p6 3s2 3p6
  • Now we just have to follow the arrows until we sum 19 electrons:4s1 1s2 2s2 2p6 3s2 3p6 4s1
  • Now we just have to follow the arrows until we sum 19 electrons:4s1 1s2 2s2 2p6 3s2 3p6 4s1 The sum of the superscripts must be 19!
  • Practice writing the electron configuration of any other atom from the periodic table! For more resources on chemistry visit: Periodic table with names http://periodictablewithnames.net