Ion Formation Worksheet

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Name___________________________________________________ Date _________________ Period ____________
Ion Formation Worksheet
Chemistry; Coleman
Part One: Write the correct Lewis Dot structure for the following elements. Remember Lewis Dot structure
include only the valence electrons:
Calcium
Sulfur
Iodine
Neon
Tin
Scandium
Chromium
Silver
Part Two: Determine how many electrons the atoms above would either gain or lose when forming ions, make
sure to indicate not only how many electrons, but whether it is gaining or losing those electrons.
Calcium
Sulfur
Iodine
Neon
Tin
Scandium
Part Three: Fill in the following table.
Ion
Cation or
Name of ion
Formula
Anion?
Mg+2
Chromium
Silver
Electron configuration
Ge+4
I-1
Na+1
P-3
O-2
Part Five: Identify the following Polyatomic Ions.
Ion
PO4-3
CO3-2
OH-1
NH4+1
NO2-1
Cation or Anion?
Name
Noble gas it is like:
Part Six: Form ionic compounds. Figure out how many of each cation and each anion would need to be
combined to form an neutral ionic compound then write the formula for that compound and name it.
Remember to include roman numerals for the transition metals.
Ions
Ex: Na+1 and Se-2
Cu+1 and NO2-1
Mg+2 and I-2
Ga+3 and Te-2
Ge+4 and O-2
Li+1 and OH-1
Number of cations
needed
2
Number of anions
needed
1
Ionic compound
formed
Na2Se
Name of
compound
Sodium Selenide
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