Noble Gas Notation

Noble Gas (or Shorthand) Configurations Example: Na (11 e-) 1s22s22p63s1 Core electrons (do not participate in the “chemistry of the element)

Noble Gas (or Shorthand) Configurations Example: Na (11 e-) 1s22s22p63s1 Valence electron Core electrons (do not participate in the “chemistry of the element)

Noble Gas (or Shorthand) Configurations Example: Na (11 e-) 1s22s22p63s1 Shorthand: Use previous Noble Gas to represent core electrons

Noble Gas (or Shorthand) Configurations Example: Na (11 e-) 1s22s22p63s1 Shorthand: Use previous Noble Gas to represent core electrons [Ne] 3s1

Steps for Writing Noble Gas Electron Configuration Determine the Noble Gas that is one row up from the element. Put the symbol for the Noble Gas in brackets. Continue writing the electron configuration using the periodic table from the Noble Gas.

Noble Gas (or Shorthand) Configurations Another Example: P (15 e-)

Brain Break: Textbook Twist Line up in 2 lines facing the opposite direction of the person next to you. Twist to pass the textbook down the line Whichever line gets the textbook down and back the fastest wins!

Noble Gas (or Shorthand) Configurations Another Example: Ca (20 e-)

Noble Gas (or Shorthand) Configurations You Try: Br (35 e-)

To Review Electron Configurations A Way to Track the Electrons in an Atom

To Review Electron Configurations A Way to Track the Electrons in an Atom Remember: 1s22s22p63s23p64s23d7

Consider This Configuration… 1s22s22p63s23p64s23d104p4

Consider This Configuration… 1s22s22p63s23p64s23d104p4 Can we determine which element this configuration describes?

Consider This Configuration… 1s22s22p63s23p64s23d104p4 Look at very end of configuration

Identify these elements 1s22s22p4 1s22s22p63s23p1 1s22s22p63s23p64s23d2

Time to Practice