Name: ____________________________
Date: ________________
Period: ______
WS Electron Configurations
Part A (#1-2): Use the patterns in the periodic table to draw half-arrows for electrons in each orbital.
Na
sodium
___ ___ ___ ___ ___
___
3d
4s
___
3s
1.
___
2s
___ ___ ___
3p
___ ___ ___
4p
Lewis dot diagram:
___ ___ ___
2p
___
1s
Fe
iron
___ ___ ___ ___ ___
___
3d
4s
___
3s
2.
___
2s
___ ___ ___
3p
___ ___ ___
4p
Lewis dot diagram:
___ ___ ___
2p
___
1s
3. Consider the example of zinc (Zn) shown here:
1s2 2s2 2p6 3s2 3p6 4s2 3d10
Complete the Lewis dot diagram and
Bohr diagram for Silicon (Si).
Lewis dot diagram
Bohr diagram
4s2
Part B (#4-20): Use the patterns in the periodic table to electron configurations for the following atoms.
valence e– Electron Configuration
Symbol Group # Total #
(on highest level)
# e–
4.
Li
5.
N
6.
F
7.
Ne
8.
Na
9.
Mg
10.
Al
11.
Cl
12.
Ar
13.
K
14.
Ca
15.
Br
Part C (#16-20): Write the name of the element, number of valence electrons, and group number.
16) 1s22s22p1
________________
# valence e– _____ Group # ____
17) 1s22s22p4
________________
# valence e– _____ Group # ____
18) 1s22s22p63s23p2
________________
# valence e– _____ Group # ____
19) 1s22s22p63s23p64s23d2
________________
# valence e– _____ Group # ____
20) 1s22s22p63s23p64s23d104p65s1 ________________
# valence e– _____ Group # ____
Part D: Use the info from #1-20 to answer the following questions.
21) What do you notice about the group # and the # of valence e – for Li, Na, and K?
______________________________________________________________________
22) What do you notice about the group # and the # of valence e– for Mg and Ca?
______________________________________________________________________
23) What do you notice about the group # and the # of valence e – for F, Cl, and Br?
______________________________________________________________________
24) What can you conclude about the group # and the number of valence e – ?
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