Name:______________________________________________________________________________
Electron Configuration Practice (Unit 3.7)
Directions: Fill in the following table.
Energy Level #
Energy Sublevel
# of orbitals in
Sublevel
# of electrons in
sublevel
1
2
3
4
Directions: Write the electron configurations for each of the following elements.
1) Beryllium
________________________________________
2) Boron
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3) Carbon
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4) Nitrogen
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5) Oxygen
________________________________________
6) Fluorine
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7) Neon
________________________________________
8) Sodium
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9) Magnesium
________________________________________
10) Aluminum
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11) Silicon
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12) Phosphorus
________________________________________
13) Sulfur
________________________________________
14) Chlorine
________________________________________
15) Argon
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Total # of electrons in
energy Level
Name:______________________________________________________________________________
Directions: for each element provide the correct electron configuration. Then fill in the orbital diagrams with arrows to
indicate electron spin.
1) Hydrogen electron configuration_________________________________________
1s
2) Helium electron configuration____________________________________________
1s
3) Beryllium electron configuration___________________________________________
1s
2s
4) Boron electron configuration______________________________________________
1s
2s
2p
5) Carbon electron configuration_____________________________________________
1s
2s
2p
Directions: For the remaining questions, you will need to provide the orbital diagram to fill in you arrows.
6) Nitrogen electron configuration____________________________________________
7) Silicon electron configuration____________________________________________
8) Oxygen electron configuration____________________________________________
9) Sulfur electron configuration____________________________________________
10) Argon electron configuration____________________________________________
Name:______________________________________________________________________________
Directions: Using the patterns you discovered and the diagram below, write out the standard electron configuration for
each of the following elements.
1) Ti
2) Tc
3) V
4)Ag
5) I
Directions: Using the patterns that you discovered and the diagram below, write out the noble gas electron
configuration for each of the following elements.
1) Rb
2)Zr
3) At
4) Fe
5) Al
Directions: answer the questions below
1) How many electrons are in the outermost energy level of sodium?
a) 1
b) 2
c) 6
d) 11
e) 4
2) The number of unpaired electrons in a nitrogen atom is ____________.
a) 1
b) 3
c) 5
d) 7
3) The following is the correct noble gas configuration for polonium.
a)[Rn]4s24p63d2
b)[Xe]6s24f145d106p4
c) [Xe]6s25d106p4
d) [Xe]6s26p14f14
4) The electron configuration for Gallium is:
a) 1s22s22p63s23p64s23d64p4
b) 1s22s22p63s23p64s24p63d2
c) 1s22s22p63s23p64s23d84p2
d)1s22s22p63s23p64s23d104p1
5) The noble gas configuration for Nb is:
a)[Kr]4s24p63d2
b)[Kr]5s24d3
c) [Xe]5s24d2
d)[Xe]6s26p14f14