Unit: Electron Configurations
"Electron Configs. For Ions" – WS #3
Directions: Write the LONG WAY and the ABBREVIATED WAY for all electron
configurations.
1. Did you read the directions above?  Ok then, write the electron configuration,
for N and N-3. How many electrons are in the valence energy level?
N:____________________
N-3:_
Which neutral atom is isoelectronic with N-3? _
How many valence electrons does neutral N have?
2. Write the electron configuration, for Cl and Cl-1. How many electrons are in the
valence energy level?
Cl:______
Cl-1:_
Which neutral atom is isoelectronic with Cl-1? _
How many valence electrons does neutral Cl have?
3. Write the electron configuration, for Sr and Sr+2. How many electrons are in the
valence energy level?
Sr:______
Sr+2:_
Which neutral atom is isoelectronic with Sr+2? _
How many valence electrons does neutral Sr have?
4. Write the electron configuration, for Mn and Mn+4. How many electrons are
in the valence energy level?
Mn:______________________
Mn+4:_
Which neutral atom is isoelectronic with Mn+4?
_

How many valence electrons does neutral Mn have

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