ELECTRONS IN ATOMS

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ELECTRON CONFIGURATION

Step 1:

identify how many electrons are in the atom

Step 2:

determine the energy level of the atom

Step 3:

determine the number of sub levels

Step 4:

Assign electrons to the sub level following the 3 rules

Step 5:

write the complete electron configuration

example:

Carbon has 6 electrons

1s22s22p2

STEPS TO DRAW ORBITAL NOTATION

  • No two electrons can have the same four quantum numbers.
  • to show different direction of spin is written as one arrow going up and one arrow going down
  • electrons individually fill empty orbitals before pairing up